A144417 - OEIS

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A144417

Triangle in A144385 read upwards by columns.

1

1, 1, 0, 1, 1, 0, 1, 3, 1, 0, 1, 6, 7, 0, 0, 1, 10, 25, 10, 0, 0, 1, 15, 65, 75, 10, 0, 0, 1, 21, 140, 315, 175, 0, 0, 0, 1, 28, 266, 980, 1225, 280, 0, 0, 0, 1, 36, 462, 2520, 5565, 3780, 280, 0, 0, 0, 1, 45, 750, 5670, 19425, 26145, 9100, 0, 0, 0, 0, 1, 55

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

0,8

LINKS

Table of n, a(n) for n=0..67.

EXAMPLE

Triangle begins:

1

1,0

1,1,0

1,3,1,0

1,6,7,0,0

1,10,25,10,0,0

1,15,65,75,10,0,0

1,21,140,315,175,0,0,0

CROSSREFS

Column sums give A001680. Cf. A144385.

Sequence in context: A090181 A368504 A256551 * A085791 A144645 A151510

Adjacent sequences: A144414 A144415 A144416 * A144418 A144419 A144420

KEYWORD

nonn,tabl

AUTHOR

David Applegate and N. J. A. Sloane, Dec 07 2008

STATUS

approved