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 A211771 #10 Sep 27 2020 14:53:13 %S A211771 1,4,6,8,9,12,14,15,16,18,24,25,26,27,28,34,35,36,38,39,45,46,48,49, %T A211771 56,57,58,68,69,78,123,124,125,126,128,129,134,135,136,138,145,146, %U A211771 147,148,156,158,159,168,169,178,189,234,235,236,237,238,245,246,247 %N A211771 Nonprime numbers with distinct digits in ascending order. %C A211771 Sequence is finite with 411 terms, last term is a(411) = 123456789. %C A211771 Complement of A052015 with respect to A009993. Supersequence of A211772. %H A211771 Jaroslav Krizek, <a href="/A211771/b211771.txt">Table of n, a(n) for n = 1..411</a> (complete list) %F A211771 A178788(a(n)) = 1. %t A211771 nnddQ[n_]:=!PrimeQ[n]&&Max[DigitCount[n]]<2&&Min[Differences[ IntegerDigits[ n]]]>0; Select[Range[300],nnddQ] (* _Harvey P. Dale_, Sep 27 2020 *) %Y A211771 Cf. A052015 (primes with distinct digits in ascending order), A009993 (numbers with distinct digits in ascending order), A211772 (nonprime numbers all of whose divisors are numbers whose decimal digits are in ascending order). %K A211771 nonn,base,fini %O A211771 1,2 %A A211771 _Jaroslav Krizek_, May 07 2012