A072781 - OEIS

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A072781

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

5

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

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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