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A124816 Product of Riordan array (1,x(1-x^2))^(-1) and number triangle T(n,k)=C(floor(k/2),n-k). 2
1, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 0, 2, 1, 1, 0, 3, 3, 3, 2, 1, 0, 0, 7, 4, 5, 2, 1, 0, 12, 12, 12, 10, 6, 3, 1, 0, 0, 30, 18, 24, 12, 9, 3, 1, 0, 55, 55, 55, 50, 32, 22, 10, 4, 1, 0, 0, 143, 88, 121, 66, 57, 25, 14, 4, 1, 0, 273, 273, 273 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,13

COMMENTS

Product of A124305 and A124788. Columns include aerated A001764,A047749(n+1),A124817,A084081. Row sums are A124818.

LINKS

Table of n, a(n) for n=0..69.

EXAMPLE

Triangle begins

1,

0, 1,

0, 0, 1,

0, 1, 1, 1,

0, 0, 2, 1, 1,

0, 3, 3, 3, 2, 1,

0, 0, 7, 4, 5, 2, 1,

0, 12, 12, 12, 10, 6, 3, 1,

0, 0, 30, 18, 24, 12, 9, 3, 1,

0, 55, 55, 55, 50, 32, 22, 10, 4, 1

CROSSREFS

Cf. A124790.

Sequence in context: A316632 A111571 A051509 * A238349 A318754 A318758

Adjacent sequences:  A124813 A124814 A124815 * A124817 A124818 A124819

KEYWORD

nonn,tabl

AUTHOR

Paul Barry, Nov 08 2006

STATUS

approved

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Last modified January 24 21:49 EST 2022. Contains 350565 sequences. (Running on oeis4.)