cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A249675 Multinomial coefficient (2+3+...+prime(n); 2,3,5,7,...,prime(n)) = A007504(n)! / A111180(n).

This page as a plain text file.
%I A249675 #11 Nov 04 2014 23:09:16
%S A249675 1,10,2520,49008960,1052427228652800,18543848132205515927808000,
%T A249675 3663312848979081767807855264321333760000,
%U A249675 1860046674511129497317809046448809961990598435124736000000,46250563343969315569958487234182581699417368835772148395100189090556723200000000
%N A249675 Multinomial coefficient (2+3+...+prime(n); 2,3,5,7,...,prime(n)) = A007504(n)! / A111180(n).
%p A249675 a := n -> add(ithprime(k),k=1..n)!/mul(ithprime(k)!,k=1..n);
%p A249675 seq(a(n),n=0..9); # _Peter Luschny_, Nov 04 2014
%o A249675 (PARI) a(n) = my(d=1,t=0); forprime(p=2,prime(n),d*=p!;t+=p);t!\d
%Y A249675 Cf. A000040, A007504, A111180, A022915
%K A249675 nonn
%O A249675 1,2
%A A249675 _Franklin T. Adams-Watters_, Nov 03 2014