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 A350601 #9 Jan 08 2022 22:08:50 %S A350601 0,0,2,0,2,8,0,2,10,10,0,2,10,12,12,0,2,10,14,14,14,0,2,10,14,16,16, %T A350601 16,0,2,10,14,22,22,22,20,0,2,10,14,22,24,24,24,22,0,2,10,14,22,24,28, %U A350601 28,26,24 %N A350601 Array read by antidiagonals: row n lists even numbers that are "generated" (in Kaprekar's sense) in all bases 2, 4, 6, ..., 2n. %C A350601 Max Alekseyev's PARI "Gen" program (see A010061) is essential for computing the rows. Cf. A349833. %H A350601 <a href="/index/Coi#Colombian">Index entries for Colombian or self numbers and related sequences</a> %e A350601 The initial rows of the array are: %e A350601 0, 2, 8, 10, 12, 14, 16, 20, 22, 24, 26, 28, 34, 36, 38, 40, 42, 44, 50, 52, ... [the even terms of A228082] %e A350601 0, 2, 10, 12, 14, 16, 22, 24, 26, 28, 34, 36, 38, 40, 44, 50, 58, 60, 62, 66 ... [A349831] %e A350601 0, 2, 10, 14, 16, 22, 24, 28, 34, 36, 38, 44, 50, 58, 60, 62, 66, 68, 72, 74, ... [A349832] %e A350601 0, 2, 10, 14, 22, 24, 28, 36, 38, 44, 50, 58, 60, 62, 66, 68, 74, 76, 82, 84, ... [A349833] %e A350601 0, 2, 10, 14, 22, 24, 28, 36, 38, 44, 50, 58, 60, 62, 66, 68, 74, 76, 82, 84, ... %e A350601 0, 2, 10, 14, 22, 28, 36, ... %e A350601 0, 2, 10, 14, 22, 36, ... %e A350601 0, 2, 10, 14, 22, 36,... %e A350601 0, 2, 10, 14, 22, ... %e A350601 ... %e A350601 The rows converge to A230624, which is %e A350601 0, 2, 10, 14, 22, 38, 62, 94, 158, 206, 318, 382, 478, 606, 766, 958, 1022, ... %e A350601 The initial antidiagonals are: %e A350601 0, %e A350601 0, 2, %e A350601 0, 2, 8, %e A350601 0, 2, 10, 10, %e A350601 0, 2, 10, 12, 12, %e A350601 0, 2, 10, 14, 14, 14, %e A350601 0, 2, 10, 14, 16, 16, 16, %e A350601 0, 2, 10, 14, 22, 22, 22, 20, %e A350601 0, 2, 10, 14, 22, 24, 24, 24, 22, %e A350601 0, 2, 10, 14, 22, 24, 28, 28, 26, 24, %e A350601 ... %Y A350601 The first few rows of the array are A228082 (even terms only), A349831, A349832, and A349833. %Y A350601 Cf. A003052, A010061, A230624. %K A350601 nonn,tabl,more %O A350601 1,3 %A A350601 _N. J. A. Sloane_, Jan 08 2022 %E A350601 [Needs checking and extending]