A304090 Inverse of A282291: if A282291(k) = n, a(n) = k, or 0 if n does not occur in A282291.

1, 2, 4, 6, 8, 3, 14, 26, 66, 9, 34, 5, 96, 15, 11, 6531, 193, 67, 386, 7, 17, 35, 770, 27, 6146, 97, 7484, 19, 1538, 10, 3074, 1210614, 37, 194, 21, 71, 14647, 387, 99, 29, 30533, 16, 60824, 39, 69, 771, 122349, 6532, 367278, 6147, 196, 101, 245225, 7485, 41, 31, 389, 1539, 688293, 12, 1535694, 3075, 73

Offset: 1

Author

Antti Karttunen, May 17 2018

Keywords

• nonn

Comments

This is a left inverse of A282291, and also the right inverse if A282291 is a permutation of natural numbers, in which case the fallback-clause is unnecessary.

Crossrefs

Cf. A282291, A302854.

Programs

PARI

\\ Use the program given in A282291.

Formula

For n >= 1, a(A282291(n)) = n.