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

Author

Antti Karttunen, May 20 2018

Keywords

• nonn

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.

Crossrefs

Cf. A304755 (inverse).

Programs

PARI

\\ Use the program given in A304755.

Formula

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