756 reputation
217
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location Zurich, Switzerland
age
visits member for 2 years, 3 months
seen Mar 19 at 17:54

Sep
25
asked Combinations of resistor networks?
Sep
21
comment Counting Hexagons in Triangle Grid Recurrence?
@BrianM.Scott: What was your technique?
Sep
17
awarded  Benefactor
Sep
17
accepted Counting Hexagons in Triangle Grid Recurrence?
Sep
17
comment Counting Hexagons in Triangle Grid Recurrence?
This is correct, thanks. I was fooled by the N=4 case into thinking that all hexagons that touch all three sides must have one side of n-2, which is true for N=4 but not true for higher values of N. For example for N=5 we can have a hexagon that results from chopping off triangles of side 2 removed from each corner of the grid.
Sep
16
revised Counting Hexagons in Triangle Grid Recurrence?
added 114 characters in body
Sep
16
awarded  Promoter
Sep
14
asked Counting Hexagons in Triangle Grid Recurrence?
Sep
8
accepted N unlabelled balls in M labeled buckets
Sep
8
comment N unlabelled balls in M labeled buckets
This proves it incorrect, however I still don't see what went wrong in my reasoning. The number of ways to put N labelled balls in M labelled buckets is $M^N$ correct? So why can't I just divide by the number of permutations of N balls to arrive at the unlabelled ball case?
Sep
8
comment N unlabelled balls in M labeled buckets
Why isn't my expression correct?
Sep
8
asked N unlabelled balls in M labeled buckets
Aug
31
accepted “Sum” over logical and?
Aug
31
revised Hyper Birthday Paradox?
added 7 characters in body
Aug
31
asked “Sum” over logical and?
Aug
28
accepted Closed form for $T(1) = K, T(x) = xT(x-1) + x$?
Aug
28
comment Closed form for $T(1) = K, T(x) = xT(x-1) + x$?
Yes $x \in \mathbb{Z^+}$
Aug
28
asked Closed form for $T(1) = K, T(x) = xT(x-1) + x$?
Aug
27
revised Combinations of nonincreasing sequences within bounds?
deleted 10 characters in body
Aug
27
comment Combinations of nonincreasing sequences within bounds?
See my answer for what I was looking for. I guess you were thinking general solution or nothing. I just wanted a way to calculate it.