A056560 - OEIS

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A056560

Tetrahedron with T(t,n,k)=n-k; succession of growing finite triangles with increasing values towards bottom left.

0, 0, 1, 0, 0, 1, 0, 2, 1, 0, 0, 1, 0, 2, 1, 0, 3, 2, 1, 0, 0, 1, 0, 2, 1, 0, 3, 2, 1, 0, 4, 3, 2, 1, 0, 0, 1, 0, 2, 1, 0, 3, 2, 1, 0, 4, 3, 2, 1, 0, 5, 4, 3, 2, 1, 0, 0, 1, 0, 2, 1, 0, 3, 2, 1, 0, 4, 3, 2, 1, 0, 5, 4, 3, 2, 1, 0, 6, 5, 4, 3, 2, 1, 0, 0, 1, 0, 2, 1, 0, 3, 2, 1, 0, 4, 3, 2, 1, 0, 5, 4, 3, 2, 1, 0

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OFFSET

0,8

LINKS

Table of n, a(n) for n=0..104.

FORMULA

a(n) = A056557(n) - A056558(n).

EXAMPLE

First triangle: [0]; second triangle: [0; 1 0]; third triangle: [0; 1 0; 2 1 0]; ...

CROSSREFS

Together with A056558 and A056559 might enable reading "by antidiagonals" of cube arrays as 3-dimensional analog of A002262 and A025581 with square arrays.

Sequence in context: A364032 A333397 A101676 * A345415 A096608 A155102

Adjacent sequences: A056557 A056558 A056559 * A056561 A056562 A056563

KEYWORD

nonn

AUTHOR

Henry Bottomley, Jun 26 2000

STATUS

approved