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 A112760 #9 Feb 07 2020 08:49:58 %S A112760 0,1,0,2,0,1,3,0,1,2,0,4,1,2,3,0,0,1,5,2,3,0,4,1,1,2,6,3,0,4,0,1,5,2, %T A112760 2,3,0,7,0,4,1,5,1,2,6,3,3,0,4,0,1,8,1,5,2,6,2,3,0,7,4,0,4,1,5,1,2,9, %U A112760 2,6,3,0,7,3,0,4,0,1,8,5,1,5,2,6,2,3,10,3,0,7,4,0,1,8,4,1,5,1,2,9,6,2,6,3,0 %N A112760 Exponent of 2 (value of i) in n-th number of the form 2^i*3^j*5^k. %H A112760 Amiram Eldar, <a href="/A112760/b112760.txt">Table of n, a(n) for n = 1..10000</a> %F A112760 a(n) = A007814(A051037(n)); %F A112760 a(n) = A112759(n) - A112761(n) - A112762(n). %t A112760 IntegerExponent[#, 2] & /@ Select[Range[3000], Last @ Map[First, FactorInteger[#]] <= 5 &] (* _Amiram Eldar_, Feb 07 2020 *) %Y A112760 Cf. A007814, A022328, A051037, A112759, A112761, A112762. %K A112760 nonn %O A112760 1,4 %A A112760 _Reinhard Zumkeller_, Sep 18 2005