A072738 X-projection of the tabular N X N -> N bijection A072733.

0, 1, 1, 2, 2, 0, 2, 3, 3, 1, 3, 4, 4, 2, 0, 3, 4, 5, 5, 3, 1, 4, 5, 6, 6, 4, 2, 0, 4, 5, 6, 7, 7, 5, 3, 1, 5, 6, 7, 8, 8, 6, 4, 2, 0, 5, 6, 7, 8, 9, 9, 7, 5, 3, 1, 6, 7, 8, 9, 10, 10, 8, 6, 4, 2, 0, 6, 7, 8, 9, 10, 11, 11, 9, 7, 5, 3, 1, 7, 8, 9, 10, 11, 12, 12, 10, 8, 6, 4, 2, 0, 7, 8, 9, 10, 11, 12, 13

Offset

0,4

Links

Table of n, a(n) for n=0..97.

Prog

(Scheme) (define (A072738 n) (A025581 (A072732 n)))

Crossrefs

The Y-projection is A072739. Composition of A025581 & A072732. A072785(n) = A072781(n)-A072738(n).

Sequence in context: A228430 A241533 A370885 * A165316 A362991 A215976

Adjacent sequences: A072735 A072736 A072737 * A072739 A072740 A072741

Keyword

nonn,tabl

Author

Antti Karttunen, Jun 12 2002

Status

approved