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 A246275 #12 Feb 01 2015 10:00:24 %S A246275 1,3,2,5,8,4,7,14,24,6,9,26,34,48,10,11,20,124,76,120,12,13,44,54,342, %T A246275 142,168,16,15,32,174,90,1330,220,288,18,17,80,64,538,186,2196,322, %U A246275 360,22,19,74,624,118,1572,246,4912,436,528,28,21,62,244,2400,208,2872,390,6858,666,840,30 %N A246275 Square array A246278 minus 1. %H A246275 Antti Karttunen, <a href="/A246275/b246275.txt">Table of n, a(n) for n = 1..2080; the first 64 antidiagonals of the array</a> %H A246275 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A246275 a(n) = A246278(n+1)-1. %F A246275 As a composition of related permutations: %F A246275 a(n) = A246273(A038722(n)). %e A246275 The top-left corner of the array: %e A246275 1, 3, 5, 7, 9, 11, 13, 15, 17, ... %e A246275 2, 8, 14, 26, 20, 44, 32, 80, 74, ... %e A246275 4, 24, 34, 124, 54, 174, 64, 624, 244, ... %e A246275 6, 48, 76, 342, 90, 538, 118, 2400, 846, ... %e A246275 10, 120, 142, 1330, 186, 1572, 208, 14640, 1858, ... %e A246275 12, 168, 220, 2196, 246, 2872, 298, 28560, 3756, ... %e A246275 ... %o A246275 (Scheme) (define (A246275 n) (- (A246278 (+ 1 n)) 1)) %Y A246275 Inverse permutation: A246276. %Y A246275 Transpose: A246273. %Y A246275 One less than A246278. %Y A246275 Related permutations: A038722, A246675, A246676. %Y A246275 Cf. also A003961. %K A246275 nonn,tabl %O A246275 1,2 %A A246275 _Antti Karttunen_, Aug 21 2014 %E A246275 Formula edited slightly because of changed starting offset of A246278. - _Antti Karttunen_, Jan 27 2015