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 A025736 #7 Jul 06 2025 14:26:36 %S A025736 1,3,6,10,15,22,30,39,49,61,74,88,103,119,137,156,176,197,220,244,269, %T A025736 295,322,351,381,412,444,478,513,549,586,625,665,706,748,791,836,882, %U A025736 929,977,1027,1078,1130,1183,1237,1293,1350,1408,1467,1528,1590,1653,1717 %N A025736 Index of 9^n within sequence of numbers of form 6^i*9^j. %C A025736 Positions of zeros in A025662. - _R. J. Mathar_, Jul 06 2025 %K A025736 nonn %O A025736 1,2 %A A025736 _David W. Wilson_