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 A081988 #7 Aug 22 2022 19:23:01 %S A081988 1,2,4,6,11,12,14,16,21,22,23,25,26,28,29,32,34,36,41,43,44,47,49,52, %T A081988 56,58,61,62,63,65,66,67,74,76,82,85,89,92,94,98,111,112,114,116,121, %U A081988 122,123,125,126,128,129,132,134,136,141,143,144,147,149,152,156,158 %N A081988 Product of digits + 1 is a prime. %C A081988 Sequence is infinite: every number of the form 111..1 is in the sequence, for example. - Gabriel Cunningham (gcasey(AT)mit.edu), Apr 07 2003 %H A081988 Michael S. Branicky, <a href="/A081988/b081988.txt">Table of n, a(n) for n = 1..10000</a> %e A081988 126 is a member as 1*2*6 + 1 = 13 is a prime. %Y A081988 Cf. A000042, A052382. %K A081988 base,easy,nonn %O A081988 1,2 %A A081988 _Amarnath Murthy_, Apr 04 2003 %E A081988 More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 06 2003 %E A081988 Offset changed and a(60) and beyond from _Michael S. Branicky_, Aug 22 2022