Robert William Hanks
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 Nov 10 awarded Notable Question Oct 7 revised Prove that $2^{n-1}$ divides $\binom{n}{1} + \binom{n}{3}5 + \binom{n}{5}25 + \binom{n}{7}125 + \cdots$ for $n \geqslant 1$. edited tags Oct 7 revised Prove that $2^{n-1}$ divides $\binom{n}{1} + \binom{n}{3}5 + \binom{n}{5}25 + \binom{n}{7}125 + \cdots$ for $n \geqslant 1$. added 4 characters in body Oct 7 revised Prove that $2^{n-1}$ divides $\binom{n}{1} + \binom{n}{3}5 + \binom{n}{5}25 + \binom{n}{7}125 + \cdots$ for $n \geqslant 1$. added 39 characters in body Oct 7 revised Prove that $2^{n-1}$ divides $\binom{n}{1} + \binom{n}{3}5 + \binom{n}{5}25 + \binom{n}{7}125 + \cdots$ for $n \geqslant 1$. added 128 characters in body Oct 7 asked Prove that $2^{n-1}$ divides $\binom{n}{1} + \binom{n}{3}5 + \binom{n}{5}25 + \binom{n}{7}125 + \cdots$ for $n \geqslant 1$. Sep 24 awarded Autobiographer Aug 27 awarded Necromancer Dec 7 awarded Nice Question Oct 8 answered What the rest of the division $1^6+2^6+…+100^6$ by $7$? Sep 29 accepted Infinitely many squares in a sequence. Sep 29 comment Infinitely many squares in a sequence. @ Don Larynx : thanks. Sep 29 asked Infinitely many squares in a sequence. Sep 15 awarded Popular Question Dec 6 accepted how to find the volume of this solid of revolution? Dec 6 asked how to find the volume of this solid of revolution? Aug 19 awarded Yearling Sep 29 comment Fastest prime generating algorithm less complexity only means that given a large enough n one algorithm will perform better than the other, but that do not mean that for a small n as 10^9 that will always be the case. Sep 22 comment Is it possible $n(n+1)(n+2)…(n+k)$ is a square? ops my fact is wrong..sorry Sep 22 comment Is it possible $n(n+1)(n+2)…(n+k)$ is a square? cant you just use bertrand postulate an the fact that the largest prime less than n+k divides the product?