A304756 Inverse of A304755: if A304755(k) = n, a(n) = k, or 0 if n does not occur in A304755.

1, 2, 4, 6, 19, 3, 32, 12, 9, 18, 62, 5, 488, 31, 23, 87, 1449, 8, 5505, 20, 36, 61, 14658, 11, 96, 487, 15, 33, 50871, 22, 190668, 198, 66, 1448, 44, 7, 736226, 5504, 492, 25, 3482516, 35

Offset

1,2

Comments

This is a left inverse of A304755, and also the right inverse if A304755 is a permutation of natural numbers, in which case the fallback clause is unnecessary.

Links

Table of n, a(n) for n=1..42.

Formula

For n >= 1, a(A304755(n)) = n.

Prog

(PARI) \\ Use the program given in A304755.

Crossrefs

Cf. A304755 (inverse).

Sequence in context: A195328 A294447 A143085 * A005227 A185185 A234019

Adjacent sequences: A304753 A304754 A304755 * A304757 A304758 A304759

Keyword

nonn

Author

Antti Karttunen, May 20 2018

Status

approved