A073430 Upper triangular region of the table A073346.

1, 1, 0, 0, 2, 0, 1, 0, 4, 0, 0, 2, 4, 8, 0, 0, 2, 8, 16, 16, 0, 0, 0, 12, 40, 48, 32, 0, 1, 0, 12, 80, 144, 128, 64, 0, 0, 2, 12, 136, 384, 448, 320, 128, 0, 0, 2, 12, 224, 912, 1408, 1280, 768, 256, 0, 0, 0, 20, 328, 2048, 4096, 4544, 3456, 1792, 512, 0, 0, 2, 16, 480, 4336

Offset

0,5

Links

Table of n, a(n) for n=0..70.

Maple

A073430 := n -> A073346bi(A003056(n), A002262(n));
A002262 := n -> n - binomial(floor((1/2)+sqrt(2*(1+n))), 2);
A003056 := n -> floor(sqrt(2*(1+n))-(1/2));

Crossrefs

Sequence in context: A086780 A158612 A143782 * A053389 A354667 A202328

Adjacent sequences: A073427 A073428 A073429 * A073431 A073432 A073433

Keyword

nonn,tabl

Author

Antti Karttunen, Jul 31 2002

Status

approved