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 A161379 #8 Jul 22 2025 06:41:54 %S A161379 2,5,7,13,29,31,37,43,61,67,71,79,89,97,107,109,113,127,131,137,139, %T A161379 151,167,179,181,191,197,199,239,251,269,277,373,383,419,521,569,577, %U A161379 587,599,641,673,683,733,773,863,883,941,983 %N A161379 Prime numbers whose Spanish names have a prime number of letters. %C A161379 Spanish version of A072686. %e A161379 e.g 137 -> CIENTOTREINTAYSIETE -> 19 letters and 19 is prime. %Y A161379 Cf. A072686. %K A161379 nonn,word %O A161379 1,1 %A A161379 _Claudio Meller_, Jun 08 2009