A261094 Left inverse of A219640: If n = A219640(k) for some k, then a(n) = k, otherwise zero.

0, 1, 2, 0, 3, 4, 0, 5, 6, 7, 0, 0, 8, 9, 10, 0, 11, 12, 0, 0, 13, 14, 15, 0, 16, 17, 0, 18, 19, 20, 0, 0, 0, 21, 22, 23, 0, 24, 25, 0, 26, 27, 28, 0, 0, 29, 30, 31, 0, 32, 33, 0, 0, 0, 34, 35, 36, 0, 37, 38, 0, 39, 40, 41, 0, 0, 42, 43, 44, 0, 45, 46, 0, 0, 47, 48, 49, 0, 50, 51, 0, 52, 53, 54, 0, 0, 0, 0, 55, 56, 57, 0, 58, 59, 0, 60, 61, 62

Offset

0,3

Links

Antti Karttunen, Table of n, a(n) for n = 0..10946

Formula

a(n) = A261092(n) * A261093(n).

Other identities. For all n >= 0:

a(A219640(n)) = n.

Prog

(Scheme) (define (A261094 n) (* (A261092 n) (A261093 n)))

Crossrefs

Cf. A219640, A261092, A261093.

Sequence in context: A349953 A349339 A117909 * A091538 A340991 A013584

Adjacent sequences: A261091 A261092 A261093 * A261095 A261096 A261097

Keyword

nonn

Author

Antti Karttunen, Aug 08 2015

Status

approved