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 A010070 #16 Nov 28 2020 03:57:09 %S A010070 1,3,5,7,16,25,34,43,52,61,70,72,81,90,99,108,117,126,135,137,146,155, %T A010070 164,173,182,191,200,202,211,220,229,238,247,256,265,267,276,285,294, %U A010070 303,312,321,330,332,341,350,359,368,377,386,395,397,406,415,424,433 %N A010070 Base 8 self or Colombian numbers (not of form k + sum of base 8 digits of k). %D A010070 Steven R. Finch, Mathematical Constants, Cambridge, 2003, Section 2.24, pp. 179-180. %D A010070 József Sándor and Borislav Crstici, Handbook of Number theory II, Kluwer Academic Publishers, 2004, Chapter 4, p. 384-386. %H A010070 Amiram Eldar, <a href="/A010070/b010070.txt">Table of n, a(n) for n = 1..10000</a> %H A010070 <a href="/index/Coi#Colombian">Index entries for Colombian or self numbers and related sequences</a> %t A010070 s[n_] := n + Plus @@ IntegerDigits[n, 8]; m = 500; Complement[Range[m], Array[s, m]] (* _Amiram Eldar_, Nov 28 2020 *) %Y A010070 Cf. A003052, A010061, A010064, A010067, A053829. %K A010070 nonn,base %O A010070 1,2 %A A010070 _Leonid Broukhis_ %E A010070 More terms from _Amiram Eldar_, Nov 28 2020