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 A249150 #10 Nov 02 2014 15:57:37 %S A249150 0,0,1,0,3,1,5,0,1,3,9,6,11,5,3,0,15,1,17,3,5,9,21,10,3,11,1,5,27,24, %T A249150 29,0,9,15,5,35,35,17,11,39,39,5,41,9,22,21,45,18,5,3,15,11,51,1,9,34, %U A249150 17,27,57,46,59,29,62,0,11,9,65,15,21,48,69,40,71,35,3,17,9,11,77,79,1 %N A249150 Number of trailing zeros in the factorial base representation of products of binomial coefficients: a(n) = A230403(A001142(n)). %C A249150 a(n) = A249151(n)-1. Please see the comments and graph of that sequence. %F A249150 a(n) = A230403(A001142(n)). %o A249150 (Scheme) (define (A249150 n) (A230403 (A001142 n))) %Y A249150 One less than A249151. %Y A249150 Cf. A249423 (values k such that a(k) = k). %Y A249150 Cf. A249425 (record positions). %Y A249150 Cf. A249426 (record values). %Y A249150 Cf. A001142, A187059, A230403. %K A249150 nonn %O A249150 0,5 %A A249150 _Antti Karttunen_, Oct 25 2014