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 A380874 #4 Mar 07 2025 09:24:12 %S A380874 16,54,58,74,76,92,94,96,98,118,126,128,136,148,154,156,158,160,162, %T A380874 164,168,176,182,184,186,188,196,216,218,238,252,254,272,274,276,292, %U A380874 294,296,298,316,318,326,346,352,364,366,372,376,382,384,386,388,392 %N A380874 Indices of odd values > 1 in A067044 (least k such that k*n has only even digits). %o A380874 (PARI) [n | n<-[1..199], (t=A067044(n))%2 && t>1] %Y A380874 Cf. A067044. %K A380874 nonn,base %O A380874 1,1 %A A380874 _M. F. Hasler_, Mar 07 2025