A085199 Inverse function of N -> N injection A071156.

0, 1, 0, 2, 0, 3, 0, 0, 0, 4, 0, 5, 0, 0, 0, 6, 0, 7, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 10, 0, 0, 0, 11, 0, 12, 0, 0, 0, 0, 0, 13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 14, 0, 15, 0, 0, 0, 16, 0, 17, 0, 0, 0, 0, 0, 18, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 19, 0, 20, 0, 0, 0, 0, 0, 21, 0, 0, 0

Offset

0,4

Comments

a(0)=0 because A071156(0)=0, but a(n) = 0 also for those n which do not occur as values of A071156. All positive natural numbers occur here once.

Links

Table of n, a(n) for n=0..98.

Formula

a(n) = A057164(A085200(n)).

Crossrefs

a(A071156(n)) = n for all n.

Sequence in context: A142971 A104117 A114511 * A338504 A085200 A080024

Adjacent sequences: A085196 A085197 A085198 * A085200 A085201 A085202

Keyword

nonn

Author

Antti Karttunen, Jun 14 2003

Status

approved