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 A326740 #6 Jul 27 2019 10:08:08 %S A326740 7,71,75,107,117,127,137,147,157,167,177,187,197,207,307,407,507,523, %T A326740 543,607,707,711,723,747,751,807,907,1071,1075,1171,1175,1271,1275, %U A326740 1371,1375,1471,1475,1571,1575,1671,1675,1771,1775,1871,1875,1971,1975,2071 %N A326740 Numbers which converge to 7 under repeated application of the powertrain map of A133500. %e A326740 75 -> 7^5 = 16807 -> 1^6*8^0*7 = 7. %Y A326740 Cf. A133500, A133501, A135384, A135385, A309385, A326733, A326734, A326735, A326736, A326737, A326738, A326739, A326741, A326742. %K A326740 nonn,base,easy %O A326740 1,1 %A A326740 _Martin Renner_, Jul 22 2019