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 A054068 Permutation of N = set of natural numbers: a(n)+C(k,2), where a=A054065 and k=Floor((1+sqrt(8n-3))/2). 4
 1, 3, 2, 5, 4, 6, 8, 10, 7, 9, 15, 12, 14, 11, 13, 20, 17, 19, 16, 21, 18, 26, 23, 28, 25, 22, 27, 24, 33, 30, 35, 32, 29, 34, 31, 36, 41, 38, 43, 40, 45, 37, 42, 39, 44, 50, 55, 47, 52, 49, 54, 46, 51, 48, 53, 60, 65, 57, 62, 59, 64, 56, 61 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS EXAMPLE Referring to A054065, just add C(k,2) to the numbers in p(k): e.g. p(1)=(1)->(1); p(2)=(2,1)->(3,2); p(3)=(2,1,3)->(5,4,6). CROSSREFS Inverse permutation: A054069. Sequence in context: A194904 A194876 A194837 * A194870 A302252 A176988 Adjacent sequences:  A054065 A054066 A054067 * A054069 A054070 A054071 KEYWORD nonn AUTHOR STATUS approved

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Last modified November 28 01:24 EST 2021. Contains 349396 sequences. (Running on oeis4.)