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 A036978 #15 Dec 04 2020 10:39:04 %S A036978 1,3,7,9,17,23,27,33,39,51,63,69,81,93,99,111,113,121,127,133,137,161, %T A036978 193,199,203,209,223,233,271,299,301,311,313,323,331,343,359,361,367, %U A036978 371,373,377,431,433,439,441,447,451,463,469,477,479,481,497 %N A036978 Numbers for which the "describe what you see" transform A045918 produces a prime. %e A036978 E.g. 33 -> "Two threes" -> 23, which is prime. %o A036978 (PARI) for(n=1,999,isprime(A045918(n)) & print1(n",")) \\ _M. F. Hasler_, Jan 27 2012 %Y A036978 Cf. A036979, A045918. %K A036978 nonn,base,easy %O A036978 1,2 %A A036978 _G. L. Honaker, Jr._ %E A036978 Corrected by inserting the missing a(19)=127 by _M. F. Hasler_, Jan 27 2012