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 A065118 #13 Feb 17 2018 14:00:32 %S A065118 114,133,152,171,190,209,228,247,266,285,399 %N A065118 Numbers which are 19 times the sum of their digits. %C A065118 The digit sums of the first 10 numbers are consecutive: 6, 7, 8, 9, 10, 11, 12, 13, 14, 15. [Howard Berman (howard_berman(AT)hotmail.com), Apr 25 2009] %C A065118 From _Bruno Berselli_, Nov 29 2013: (Start) %C A065118 Numbers which are k times the sum of their digits: %C A065118 k = 1: 1, 2, 3, 4, 5, 6, 7, 8, 9; %C A065118 k = 2: 18; %C A065118 k = 3: 27; %C A065118 k = 4: 12, 24, 36, 48; %C A065118 k = 5: 45; %C A065118 k = 6: 54; %C A065118 k = 7: 21, 42, 63, 84; %C A065118 k = 8: 72; %C A065118 k = 9: 81; %C A065118 k = 10: 10, 20, 30, 40, 50, 60, 70, 80, 90; %C A065118 k = 11: 198; %C A065118 k = 12: 108; %C A065118 k = 13: 117, 156, 195; %C A065118 k = 14: 126; %C A065118 k = 15: 135; %C A065118 k = 16: 144, 192, 288; %C A065118 k = 17: 153; %C A065118 k = 18: 162; %C A065118 k = 19: this sequence; %C A065118 k = 20: 180; %C A065118 k = 21: 378; %C A065118 k = 22: 132, 264, 396; %C A065118 k = 23: 207; %C A065118 k = 24: 216; %C A065118 k = 25: 150, 225, 375; %C A065118 k = 26: 234, 468; %C A065118 k = 27: 243, 486; %C A065118 k = 28: 112, 140, 224, 252, 280, 308, 336, 364, 392, 448, 476, 588; %C A065118 k = 29: 261; %C A065118 k = 30: 270. %C A065118 Also, k = 37 (prime) generates the list: 111, 222, 333, 370, 407, 444, 481, 518, 555, 592, 629, 666, 777, 888, 999. (End) %e A065118 114 = 19*(1+1+4), 133 = 19*(1+3+3) etc. %t A065118 Select[Range[400],#==19*Total[IntegerDigits[#]]&] (* _Harvey P. Dale_, Feb 17 2018 *) %Y A065118 Cf. A037478. %K A065118 base,fini,full,nonn %O A065118 0,1 %A A065118 _Henry Bottomley_, Nov 20 2001