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.
%I A079078 #14 May 22 2021 04:25:48 %S A079078 1,2,3,10,21,110,273,1870,5187,43010,150423,1333310,5565651,54665710, %T A079078 239322993,2569288370,12684118629,151588013830,773731236369, %U A079078 10156396926610,54934917782199,741416975642530,4339858504793721 %N A079078 a(0) = 1, a(1) = 2; for n > 1, a(n) = prime(n)*a(n-2). %e A079078 a(5)=110 because 2*5*11=110, the product of the first, third and fifth primes. %o A079078 (PARI) A079078(n)=prod(i=0,(n-1)\2,prime(n-2*i)) \\ - _M. F. Hasler_, May 04 2008 %Y A079078 Cf. A006882, A002110. %K A079078 nonn %O A079078 0,2 %A A079078 _Michael Joseph Halm_, Feb 02 2003 %E A079078 Last term corrected by _Jonathan Vos Post_, Feb 09 2006 %E A079078 Edited and corrected by _M. F. Hasler_, May 06 2008