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A144896
Third column of triangle
A134134
(S2'(2)= S1hat(2)).
1
1, 2, 10, 44, 228, 1272, 8760, 63936, 547776, 5145984, 54233280, 624291840, 7879472640, 107423677440, 1579212910080, 24832164556800, 416273901926400, 7403098797158400, 139238590721126400, 2760253302701260800, 57522218527420416000, 1256931901812400128000
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..21.
FORMULA
a(n) =
A134134
(n+3,3), n>=0.
CROSSREFS
Cf.
A134134
,
A000142
(factorials, first column).
A144895
(second column).
Sequence in context:
A084609
A105485
A151313
*
A359526
A142983
A227852
Adjacent sequences:
A144893
A144894
A144895
*
A144897
A144898
A144899
KEYWORD
nonn
,
easy
AUTHOR
Wolfdieter Lang
, Oct 09 2008
STATUS
approved
