A143119 - OEIS

A143119

Triangle read by rows, A051731 * A026741 * 0^(n-k), 1<=k<=n.

1, 1, 1, 1, 0, 3, 1, 1, 0, 2, 1, 0, 0, 0, 5, 1, 1, 3, 0, 0, 3, 1, 0, 0, 0, 0, 0, 7, 1, 1, 0, 2, 0, 0, 0, 4, 1, 0, 3, 0, 0, 0, 0, 0, 9, 1, 1, 0, 0, 5, 0, 0, 0, 0, 5, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, 1, 1, 3, 2, 0, 30, 0, 0, 0, 0, 6, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 13, 1, 1, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 7

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OFFSET

1,6

COMMENTS

Row sums = A002131: (1, 2, 4, 4, 6, 8, 8, 8, 13,...).

LINKS

Table of n, a(n) for n=1..104.

FORMULA

Triangle read by rows, A051731 * A026741 * 0^(n-k), 1<=k<=n, where A026741 starts (1, 1, 3, 2, 5, 3, 7, 4, 9,...).

EXAMPLE

First few rows of the triangle are:

1, 1;

1, 0, 3;

1, 1, 0, 2;

1, 0, 0, 0, 5;

1, 1, 3, 0, 0, 3;

1, 0, 0, 0, 0, 0, 7;

1, 1, 0, 2, 0, 0, 0, 4;

...

CROSSREFS

Cf. A026741, A002131.

Sequence in context: A238010 A370772 A011354 * A220419 A343006 A085565

Adjacent sequences: A143116 A143117 A143118 * A143120 A143121 A143122

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson & Mats Granvik, Jul 26 2008

STATUS

approved