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 A361104 a(n) = k such that A361103(k-1) = n, or -1 if n never appears in A361103. 2
 1, 2, 3, 17, 9, 4, 8, 31, 15, 7, 5, 47, 64, 6, 21, 10, 96, 20, 11, 13, 57, 38, 14, 16, 79, 37, 18, 12, 160, 28, 22, 19, 61, 24, 26, 23, 131, 52, 27, 25, 41, 33, 46, 29, 77, 45, 42, 34, 54, 59, 36, 32, 68, 72, 44, 40, 104, 82, 50, 49, 75, 111, 51, 35, 98, 143, 63, 30, 85 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Imagine the offset of A361103 is 1, and assume it really is a permutation of the natural numbers. In tabular form, it is ..1..2..3..4..5..6..7..8..9.10.11... ..1..2..3..6.11.14.10..7..5.16..19... Then the inverse permutation would be ..1..2..3.17..9..4..8.31.15..7..5.47... which is the present sequence. LINKS N. J. A. Sloane, Table of n, a(n) for n = 1..2721 EXAMPLE A361103(16) = 4, so a(4) = 17. CROSSREFS Cf. A360519, A361102, A336957, A361103. Sequence in context: A073125 A171240 A078201 * A090913 A176236 A171139 Adjacent sequences: A361101 A361102 A361103 * A361105 A361106 A361107 KEYWORD nonn AUTHOR Scott R. Shannon and N. J. A. Sloane, Mar 02 2023 EXTENSIONS Edited by N. J. A. Sloane, Mar 04 2023 STATUS approved

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Last modified April 15 20:47 EDT 2024. Contains 371696 sequences. (Running on oeis4.)