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 A025738 #7 Jul 06 2025 14:30:44 %S A025738 1,3,6,10,15,21,28,36,45,55,66,78,91,105,120,136,153,171,191,212,234, %T A025738 257,281,306,332,359,387,416,446,477,509,542,576,611,647,684,723,763, %U A025738 804,846,889,933,978,1024,1071,1119,1168,1218,1269,1321,1374,1428,1483,1540,1598 %N A025738 Index of 9^n within sequence of numbers of form 8^i*9^j. %C A025738 Positions of zeros in A025676. - _R. J. Mathar_, Jul 06 2025 %K A025738 nonn %O A025738 1,2 %A A025738 _David W. Wilson_