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 A152088 #14 Dec 28 2019 07:48:22 %S A152088 19,33,34,43,49,53,69,74,79,82,103,107,109,141,142,166,177,178,201, %T A152088 202,209,226,261,268,292,295,299,301,302,309,314,327,334,339,341,346, %U A152088 355,358,362,367,379,388,391,395,398,403,422,431,439,443,451,453,454,458 %N A152088 Positive integers k that when written in binary have exactly the same number of (non-leading) 0's as the number of divisors of k. %H A152088 Amiram Eldar, <a href="/A152088/b152088.txt">Table of n, a(n) for n = 1..10000</a> %e A152088 34 written in binary is 100010, which has four 0's. Also, 34 has 4 divisors (1,2,17,34). Since the number of binary 0's equals the number of divisors, then 34 is included in this sequence. %t A152088 Select[Range[500], DigitCount[#, 2, 0] == DivisorSigma[0, #] &] (* _Amiram Eldar_, Dec 28 2019 *) %Y A152088 Cf. A000005, A023416, A071593, A080791. %K A152088 nonn,base %O A152088 1,1 %A A152088 _Leroy Quet_, Nov 23 2008 %E A152088 Extended by _Ray Chandler_, Nov 26 2008