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A115237 Matrix square of triangle A003983. 2
1, 2, 1, 4, 4, 1, 6, 8, 4, 1, 9, 14, 10, 4, 1, 12, 20, 18, 10, 4, 1, 16, 28, 29, 20, 10, 4, 1, 20, 36, 41, 33, 20, 10, 4, 1, 25, 46, 56, 50, 35, 20, 10, 4, 1, 30, 56, 71, 69, 54, 35, 20, 10, 4, 1, 36, 68, 89, 92, 78, 56, 35, 20, 10, 4, 1, 42, 80, 107, 116, 105, 82, 56, 35, 20, 10, 4, 1 (list; table; graph; refs; listen; history; internal format)
OFFSET

0,2

EXAMPLE

1; 2,1; 4,4,1; 6,8,4,1; 9,14,10,4,1; ...

CROSSREFS

Column 0: A002620(n+2). Row sums: A115238. Convergent of columns: A000292.

Sequence in context: A009949 A070785 A105537 * A105542 A200057 A136600

Adjacent sequences:  A115234 A115235 A115236 * A115238 A115239 A115240

KEYWORD

nonn,tabl

AUTHOR

Christian G. Bower (bowerc(AT)usa.net), Jan 17 2006

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Last modified February 16 01:56 EST 2012. Contains 205860 sequences.