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 A252740 #4 Dec 23 2014 00:38:04 %S A252740 1,2,6,180,1134000,3465651420000000, %T A252740 356414438712215830124178000000000000000, %U A252740 1311750338118625705168608107387873609070899443110750355586669940000000000000000000000000000000 %N A252740 First quotients of A252738: a(0) = 1; for n >= 1, a(n) = A252738(n) / A252738(n-1). %F A252740 a(0) = 1; for n >= 1, a(n) = A252738(n) / A252738(n-1). %o A252740 (Scheme) (define (A252740 n) (if (zero? n) 1 (/ (A252738 n) (A252738 (- n 1))))) %Y A252740 Cf. A252738, A252739, A163511. %K A252740 nonn %O A252740 0,2 %A A252740 _Antti Karttunen_, Dec 21 2014