A304532 Inverse of A304531.

1, 2, 4, 6, 11, 3, 42, 20, 8, 12, 237, 5, 1798, 43, 14, 96, 7192, 9, 69611, 16, 45, 238, 431203, 21, 32, 1799, 25, 47, 2401568, 13

Offset

1,2

Comments

This is the left inverse of A304531, and also the right inverse if A304531 indeed is a permutation of natural numbers.

Links

Table of n, a(n) for n=1..30.

Formula

For all n >= 1, a(A304531(n)) = n.

Prog

(PARI) \\ Use the program given in A304531.

Crossrefs

Cf. A304531 (inverse).

Cf. also A303752.

Sequence in context: A237816 A088906 A303752 * A345091 A279911 A063183

Adjacent sequences: A304529 A304530 A304531 * A304533 A304534 A304535

Keyword

nonn,hard,more

Author

Antti Karttunen, May 14 2018

Status

approved