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 A374294 #25 Jul 03 2024 13:06:15 %S A374294 1,3,9,27,81,99,729,297,1089,891,59049,1683,531441,8019,9801,5049, %T A374294 43046721,18513,387420489,15147,88209,649539,31381059609,31977, %U A374294 1185921,5845851,314721,136323,22876792454961,166617,205891132094649,95931,7144929,473513931,10673289,351747,150094635296999121 %N A374294 a(n) is the smallest positive integer k such that A002325(k) = n. %F A374294 If p is prime, a(p) = 3^(p-1). %F A374294 a(n) is divisible by 3 for n > 1. %e A374294 n | a(n) %e A374294 -----+----------------------- %e A374294 2 | 3. %e A374294 3 | 9 = 3^2. %e A374294 4 | 27 = 3^3. %e A374294 5 | 81 = 3^4. %e A374294 6 | 99 = 3^2 * 11. %e A374294 7 | 729 = 3^6. %e A374294 8 | 297 = 3^3 * 11. %e A374294 9 | 1089 = 3^2 * 11^2. %e A374294 10 | 891 = 3^4 * 11. %e A374294 11 | 59049 = 3^10. %e A374294 12 | 1683 = 3^2 * 11 * 17. %Y A374294 Cf. A002325, A033715, A033200, A200977, A374295. %K A374294 nonn %O A374294 1,2 %A A374294 _Seiichi Manyama_, Jul 02 2024