A130463 First column of square array A130462.

1, 1, 3, 7, 25, 75, 275, 927, 3438, 12306, 46131, 170695, 646399, 2439582, 9321149, 35629281, 137156187, 528893353, 2048588717, 7950709147, 30951860693, 120722736668, 471927571577, 1847953114948, 7248961671334, 28476897249963

Offset

0,3

Links

Table of n, a(n) for n=0..25.

Example

Square array A130462 begins:
(1), 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, ...;
(1), (2), 3, 4, 5, 6, 7, 8, 9, 10, ...;
(3), 7, (12), 18, 25, 33, 42, 52, ...;
(7), 25, 50, (83), 125, 177, 240, ...;
(25), 75, 200, 377, (617), 932, ...;
(75), 275, 652, 1584, 2919, (4759), ...; ...
where row n+1 equals the partial sums of the sequence resulting from removing the terms in the first column and main diagonal from row n.

Crossrefs

Cf. A130462 (array), A130464 (main diagonal).

Sequence in context: A148731 A148732 A151269 * A148733 A148734 A124425

Adjacent sequences: A130460 A130461 A130462 * A130464 A130465 A130466

Keyword

nonn

Author

Paul D. Hanna, May 26 2007

Status

approved