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A117422 Column 4 of triangle A117418. 6
1, 5, 20, 79, 322, 1385, 6293, 30152, 151842, 801220, 4414013, 25314411, 150707813, 929456660, 5924776551, 38954031366, 263667692262, 1834336985083, 13095675086752, 95805809484401, 717326794547940, 5490635404488630 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

CROSSREFS

Cf. A117418; A117419, A117420, A117421, A117423, A117424.

Sequence in context: A079737 A028814 A079820 * A154639 A162925 A163316

Adjacent sequences:  A117419 A117420 A117421 * A117423 A117424 A117425

KEYWORD

nonn

AUTHOR

Paul D. Hanna (pauldhanna(AT)juno.com), Mar 14 2006

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Last modified February 17 04:58 EST 2012. Contains 205985 sequences.