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 A353727 #13 May 13 2022 07:58:52 %S A353727 0,2,3,11,54,74,88,183,20334,30938,21247,90575,3913,124845,2643790, %T A353727 5828721,2469947,4005550,19917707 %N A353727 Index in A353715 of the first term divisible by 2^n and no higher power of 2, or -1 if no such term exists. %e A353727 Table showing initial values of n (column 1) and a(n) (column 3). %e A353727 The central column shows the corresponding entry of A353715 written in base 2. %e A353727 The entries in column 2 end in exactly n zeros. %e A353727 n A353715(a(n)) a(n) %e A353727 0 1 0 %e A353727 1 110 2 %e A353727 2 1100 3 %e A353727 3 1101000 11 %e A353727 4 11110000 54 %e A353727 5 1111100000 74 %e A353727 6 11101000000 88 %e A353727 7 110110000000 183 %e A353727 8 1111110101100000000 20334 %e A353727 9 10111110101000000000 30938 %e A353727 10 1111111110000000000 21247 %e A353727 11 1001111111100000000000 90575 %e A353727 12 11111000000000000 3913 %e A353727 13 10011111110000000000000 124845 %e A353727 14 111110111110100000000000000 2643790 %e A353727 15 10011111111111000000000000000 5828721 %e A353727 16 111111111110000000000000000 2469947 %e A353727 17 1111111101100000000000000000 4005550 %e A353727 18 1011111111111000000000000000000 19917707 %Y A353727 Cf. A353709, A353715, A353724, A353725, A353726. %K A353727 nonn,more %O A353727 0,2 %A A353727 _Walter Trump_, May 11 2022