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 A180267 #5 Mar 05 2017 10:56:01 %S A180267 1,5544,148512,1211364,5301223200,67804092195840,128850876, %T A180267 8937268342895692800,4383026968320,2042765424,147107459292393600, %U A180267 40633707301699873935974400,17158084020,24300280368 %N A180267 Prime(2*n+1)!/(60*prime(2*n-1)!). %C A180267 Oscillating sequence %H A180267 Harvey P. Dale, <a href="/A180267/b180267.txt">Table of n, a(n) for n = 1..1000</a> %e A180267 a(3)=prime(7)!/prime(5)!/60=355687428096000/39916800/60=148512 %t A180267 #[[2]]/(60*#[[1]])&/@Partition[Prime[Range[1,31,2]]!,2,1] (* _Harvey P. Dale_, Mar 05 2017 *) %o A180267 (PARI) a(n)=prime(2*n+1)!/prime(2*n-1)!/60 %Y A180267 Cf. A178614 %K A180267 easy,nonn %O A180267 1,2 %A A180267 Graziano Aglietti (mg5055(AT)mclink.it), Aug 23 2010