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 A147801 #12 Aug 12 2020 08:51:52
%S A147801 2,2,10,10,22,110,278,238,1054,1342,11066,6118,18734,107030,557270,
%T A147801 163030,1440430,2195110,11016290,3641210,23250370,38188766
%N A147801 Minimal value of A007947(m*(3^n-m)) with m coprime to 3.
%C A147801 Related to the abc conjecture. The minima are reached for m values given in A147802.
%C A147801 All terms of this sequence are even, so one could also consider A147801/2 = 1, 1, 5, 5, 11, 55, 139, 119, 527, 671, 5533, 3059, 9367, 53515, 278635, 81515, ...
%o A147801 (PARI) A147801(n, p=3) = {my(m=n=p^n); for(x=1, (n-1)\2, x%p || next; A007947(n-x)*A007947(x)<m || next; m=A007947((n-x)*x)); m; }
%Y A147801 Cf. A007947, A147298 (general case), A143702 (analog for 2^n), A147800 (analog for 5^n), A147802.
%K A147801 nonn,more
%O A147801 1,1
%A A147801 _M. F. Hasler_, Nov 13 2008
%E A147801 a(17)-a(22) from _Jinyuan Wang_, Aug 11 2020