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A103768 (29*3^n - 18(n + 3)*2^n + 6n^2 + 24n + 27)/12. 1
0, 0, 6, 46, 228, 930, 3406, 11682, 38412, 122806, 385182, 1192254, 3656452, 11141178, 33791934, 102161962, 308156748, 928008846, 2791497262, 8390220006, 25203689700, 75680274610, 227185526766, 681858569586, 2046204853708 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

FORMULA

a(n) = A078341(n, 3) = 3a(n-1)+n*A095151(n-1)

CROSSREFS

Sequence in context: A043076 A154651 A079910 * A073507 A155598 A190005

Adjacent sequences:  A103765 A103766 A103767 * A103769 A103770 A103771

KEYWORD

nonn

AUTHOR

Henry Bottomley (se16(AT)btinternet.com), Feb 15 2005

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Last modified February 16 17:11 EST 2012. Contains 205938 sequences.