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 A163239 #8 May 09 2025 22:03:22 %S A163239 0,3,1,15,2,5,12,14,6,4,60,13,10,7,20,63,61,9,11,23,21,51,62,57,8,27, %T A163239 22,17,48,50,58,56,24,26,18,16,240,49,54,59,40,25,30,19,80,243,241,53, %U A163239 55,43,41,29,31,83,81,255,242,245,52,39,42,45,28,95,82,85,252,254,246 %N A163239 Transpose of array A163237. %C A163239 The top left 8x8 corner of this array %C A163239 +0 +3 15 12 60 63 51 48 %C A163239 +1 +2 14 13 61 62 50 49 %C A163239 +5 +6 10 +9 57 58 54 53 %C A163239 +4 +7 11 +8 56 59 55 52 %C A163239 20 23 27 24 40 43 39 36 %C A163239 21 22 26 25 41 42 38 37 %C A163239 17 18 30 29 45 46 34 33 %C A163239 16 19 31 28 44 47 35 32 %C A163239 corresponds with Adamson's "H-bond codon-anticodon magic square" (see page 287 in Pickover's book): %C A163239 CCC CCU CUU CUC UUC UUU UCU UCC %C A163239 CCA CCG CUG CUA UUA UUG UCG UCA %C A163239 CAA CAG CGG CGA UGA UGG UAG UAA %C A163239 CAC CAU CGU CGC UGC UGU UAU UAC %C A163239 AAC AAU AGU AGC GGC GGU GAU GAC %C A163239 AAA AAG AGG AGA GGA GGG GAG GAA %C A163239 ACA ACG AUG AUA GUA GUG GCG GCA %C A163239 ACC ACU AUU AUC GUC GUU GCU GCC %C A163239 when the base-triples are interpreted as quaternary (base-4) numbers, with the following rules: C = 0, A = 1, G = 2, U = 3. %D A163239 Clifford A. Pickover, The Zen of Magic Squares, Circles, and Stars: An Exhibition of Surprising Structures across Dimensions, Princeton University Press, 2002, pp. 285-289. %H A163239 A. Karttunen, <a href="/A163239/b163239.txt">Table of n, a(n) for n = 0..2079</a> %H A163239 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A163239 Inverse: A163240. a(n) = A163241(A163235(n)). Transpose: A163237. Cf. A147995. %K A163239 nonn,tabl %O A163239 0,2 %A A163239 _Antti Karttunen_, Jul 29 2009