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A091031 Third to last entries in rows of array A090452 (scaled (3,2)-Stirling2). 1
1, 16, 114, 644, 3270, 15642, 72072, 323752, 1428102, 6214520, 26761196, 114287736, 484816540, 2045277990, 8588492100, 35923392720, 149753379270, 622458753840, 2580709189740, 10675646755800, 44074384410420 (list; graph; refs; listen; history; internal format)
OFFSET

2,2

FORMULA

a(n)= A090452(n, 2*(n-1)), n>=2.

a(n)= (9*n^2-19*n+8)*(n-1)*C(n)/(4*(2*n-1)), n>=2; with the Catalan numbers C(n)=A000108(n).

CROSSREFS

Cf. A000108 (last row entries), 3*A002054(n-1) (second to last row entries).

Sequence in context: A205964 A081194 A121148 * A055994 A044348 A044729

Adjacent sequences:  A091028 A091029 A091030 * A091032 A091033 A091034

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang (wolfdieter.lang_AT_physik_DOT_uni-karlsruhe_DOT_de), Jan 09 2004

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Last modified February 16 09:27 EST 2012. Contains 205904 sequences.