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 A362449 #8 Jul 09 2025 05:01:43 %S A362449 0,0,0,4,3,6,6,3,13,22,35,32,36,89,158,342,586,913,1490,2365,3884, %T A362449 5940,8629,12386,17637,26311 %N A362449 Number of length-n American English expressions for positive integers (spaces, hyphens, and commas excluded). %C A362449 Limited to numbers < 10^306. %C A362449 This entry is simply a copy of A121064 with a(4) changed from 4 to 3. See that entry for further information. The present version matches the problem in the GCHQ Puzzle Book. %D A362449 GCHQ, The GCHQ Puzzle Book, Penguin, 2016. See page 123, Problem 6. %Y A362449 Cf. A121064. %K A362449 nonn,word,more,fini %O A362449 0,4 %A A362449 _N. J. A. Sloane_, Apr 23 2023, based on A121064