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 A088244 #13 Aug 30 2019 08:00:12 %S A088244 1,1,2,4,8,8,15,15,24,40,45,45,66,66,72,84,112,112,153,153,171,190, %T A088244 200,200,253,253,264,336,364,364,405,405,480,512,528,528,630,630,648, %U A088244 684,741,741,800,800,840,924,946,946,1081,1081,1104,1152,1200,1200 %N A088244 Number of 3-smooth divisors of n!. %H A088244 Amiram Eldar, <a href="/A088244/b088244.txt">Table of n, a(n) for n = 0..10000</a> %F A088244 a(n) = A072078(A000142(n)). %F A088244 a(n) = a(n-1) iff gcd(n,6) = 1. %F A088244 a(n) = (A011371(n)+1)*(A054861(n)+1). %t A088244 a[n_] := ((1 + IntegerExponent[n!, 2])*(1 + IntegerExponent[n!, 3])); Array[a, 100, 0] (* _Amiram Eldar_, Aug 30 2019 *) %Y A088244 Cf. A000005, A003586. %Y A088244 Cf. A000142, A072078. %Y A088244 Cf. A011371, A054861. %K A088244 nonn %O A088244 0,3 %A A088244 _Reinhard Zumkeller_, Jan 23 2004