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 A318275 #16 Sep 11 2018 03:29:24 %S A318275 1,2,3,4,5,6,7,8,9,11,12,13,14,15,16,17,18,19,22,23,24,26,27,28,29,33, %T A318275 34,35,36,37,38,39,44,46,47,48,49,57,66,67,68,77,79,88,89,99,111,112, %U A318275 113,114,115,116,117,118,119,122,123,124,126,127,128,129,133,134 %N A318275 Numbers with digits in nondecreasing order and with multiplicative digital root > 0. %C A318275 This sequence is a primitive sequence of A277061, it has digits in nondecreasing order. Terms in A277061 can be found by permuting digits of terms of this sequence. %t A318275 Select[Range@ 134, And[FixedPoint[Times @@ IntegerDigits@ # &, #] != 0, AllTrue[Differences@ IntegerDigits@ #, # >= 0 &]] &] (* _Michael De Vlieger_, Aug 25 2018 *) %Y A318275 Cf. A009994, A277061, A299690. %K A318275 nonn,base %O A318275 1,2 %A A318275 _David A. Corneth_, Aug 23 2018