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A073430 Upper triangular region of the table A073346. 3
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 (list; table; graph; refs; listen; history; text; internal format)
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 A202328 A136688

Adjacent sequences:  A073427 A073428 A073429 * A073431 A073432 A073433

KEYWORD

nonn,tabl

AUTHOR

Antti Karttunen, Jul 31 2002

STATUS

approved

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Last modified October 16 16:18 EDT 2019. Contains 328101 sequences. (Running on oeis4.)