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 A025714 #9 Jul 06 2025 13:29:37 %S A025714 1,3,6,10,16,23,31,41,52,64,77,92,108,125,144,164,185,207,231,256,282, %T A025714 310,339,369,401,434,468,503,540,578,617,658,700,743,787,833,880,928, %U A025714 978,1029,1081,1134,1189,1245,1302,1361,1421,1482,1545,1609,1674,1740,1808 %N A025714 Index of 6^n within sequence of numbers of form 4^i*6^j. %C A025714 Positions of zeros in A025647. - _R. J. Mathar_, Jul 06 2025 %o A025714 (PARI) a(n)=my(N=1); n+1+sum(i=1, n, logint(N*=6, 4)); \\ _Charles R Greathouse IV_, Jan 16 2018 %o A025714 (PARI) first(n)=my(s, N=1/6); vector(n+1, i, s+=logint(N*=6, 4)+1) \\ _Charles R Greathouse IV_, Jan 16 2018 %Y A025714 Cf. A025618. Differs from A025729 at a(65). %K A025714 nonn %O A025714 1,2 %A A025714 _David W. Wilson_