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A135904 Column 1 of triangle A135902. 3
1, 2, 8, 47, 356, 3252, 34448, 412546, 5488222, 80066096, 1268400628, 21651578958, 395749634342, 7705289481276, 159106051976460, 3471184678351602, 79751883928130922, 1924103020594546192, 48622055377338993264 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..18.

CROSSREFS

Cf. A135902; A135903, A135905.

Sequence in context: A102009 A254747 A298698 * A145846 A317366 A009566

Adjacent sequences:  A135901 A135902 A135903 * A135905 A135906 A135907

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Dec 18 2007

STATUS

approved

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Last modified October 19 12:10 EDT 2019. Contains 328219 sequences. (Running on oeis4.)