A338349 -id:A338349 - cp's OEIS frontend

A338347 a(n) = index k such that A338338(k) = n, or -1 if n does not appear in A338338.

1, 2, 5, 3, 7, 4, 11, 10, 6, 8, 19, 14, 33, 12, 15, 18, 38, 22, 42, 9, 23, 20, 54, 26, 68, 32, 27, 13, 73, 16, 78, 37, 28, 39, 60, 35, 82, 41, 34, 17, 91, 24, 95, 21, 44, 53, 120, 36, 90, 31, 49, 64, 125, 56, 29, 25, 43, 72, 145, 45, 152, 79, 48, 81, 69, 57, 157, 40, 55, 46

Offset: 1

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N. J. A. Sloane, Oct 27 2020

nonn

There is a strong conjecture that A338338 is a permutation of the positive integers. If that is true, this is the inverse permutation.

Rémy Sigrist, Table of n, a(n) for n = 1..10000
Rémy Sigrist, PARI program for A338347

Cf. A338338-A338349.

PARI
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cp's OEIS Frontend

A338347 a(n) = index k such that A338338(k) = n, or -1 if n does not appear in A338338.

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