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 A255129 #8 Feb 22 2015 23:29:40 %S A255129 2,3,4,5,9,6,7,19,15,8,11,31,35,21,10,13,55,59,49,27,12,17,73,103,85, %T A255129 65,33,14,23,101,133,151,113,79,39,16,25,145,187,197,203,137,95,45,18, %U A255129 29,167,271,281,263,251,163,109,51,20,37,205,311,403,367,325,299,191,125,57,22,41,253,371,457,523,461,385,343,217,139,63,24 %N A255129 Transposed Ludic array. %C A255129 See the comments in A255127. %H A255129 Antti Karttunen, <a href="/A255129/b255129.txt">Table of n, a(n) for n = 2..10441; the first 144 antidiagonals of array, flattened</a> %o A255129 (Scheme) %o A255129 (define (A255129 n) (if (<= n 1) n (A255129bi (A002260 (- n 1)) (A004736 (- n 1))))) %o A255129 (define (A255129bi row col) ((rowfun_n_for_A255127 col) row)) ; Other code as in A255127. %Y A255129 Transpose: A255127. %Y A255129 Inverse: A255130. (When considered as a permutation of natural numbers with a(1) = 1). %Y A255129 Row 1: A003309 (without the initial 1). %Y A255129 Column 1: A005843 (even numbers). %Y A255129 Main diagonal: A255410. %K A255129 nonn,tabl %O A255129 2,1 %A A255129 _Antti Karttunen_, Feb 22 2015