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A171873 Column sums of triangle A171871 1
1, 1, 2, 10, 280, 1173468 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Next term is known to be greater than 220146725295227, based on link between A171871 and A039754.

LINKS

Table of n, a(n) for n=0..5.

R. Munafo, Classifications of N Elements

CROSSREFS

Sequence in context: A260231 A003047 A028580 * A098706 A143249 A161181

Adjacent sequences:  A171870 A171871 A171872 * A171874 A171875 A171876

KEYWORD

nonn

AUTHOR

Robert Munafo, Jan 21 2010

STATUS

approved

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Last modified January 21 21:01 EST 2017. Contains 281110 sequences.