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A163944 Fourth left hand column of triangle A163940 3
0, 4, 49, 246, 834, 2250, 5214, 10829, 20696, 37044, 62875, 102124, 159834, 242346, 357504, 514875, 725984, 1004564, 1366821, 1831714, 2421250, 3160794, 4079394, 5210121, 6590424, 8262500, 10273679, 12676824, 15530746, 18900634, 22858500 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

FORMULA

Gf(x) = x*(4+21*x-13*x^2+x^3+3*x^4-x^5)/(1-x)^7

a(n) = (10*n^2+107*n^3+61*n^4+13*n^5+n^6)/48

a(n) = 7*a(n-1)-21*a(n-2)+35*a(n-3)-35*a(n-4)+21*a(n-5)-7*a(n-6)+a(n-7)

CROSSREFS

Cf. A163972.

Equals the fourth left hand column of A163940.

A163943 is another left hand column.

Sequence in context: A166826 A078187 A100256 * A000596 A113525 A064751

Adjacent sequences:  A163941 A163942 A163943 * A163945 A163946 A163947

KEYWORD

easy,nonn

AUTHOR

Johannes W. Meijer (meijgia(AT)hotmail.com), Aug 13 2009

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Last modified February 14 07:15 EST 2012. Contains 205587 sequences.