A072781 X-projection of the tabular N X N -> N bijection A072735.

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

Offset

0,4

Links

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

Prog

(Scheme) (define (A072781 n) (A025581 (A072734 n)))

Crossrefs

The Y-projection is A072782. Composition of A025581 & A072734. A072785(n) = A072781(n)-A072738(n).

Sequence in context: A071694 A365393 A366286 * A340094 A236566 A350957

Adjacent sequences: A072778 A072779 A072780 * A072782 A072783 A072784

Keyword

nonn,tabl

Author

Antti Karttunen, Jun 12 2002

Status

approved