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A087863 (n^3+24*n^2+65*n+36)/6. 0
6, 21, 45, 79, 124, 181, 251, 335, 434, 549, 681, 831, 1000, 1189, 1399, 1631, 1886, 2165, 2469, 2799, 3156, 3541, 3955, 4399, 4874, 5381, 5921, 6495, 7104, 7749, 8431, 9151, 9910, 10709, 11549, 12431, 13356, 14325, 15339, 16399, 17506, 18661, 19865 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

a(0)=A=6; a(1)=a(0)+(A+1)+(A+2)=3A+3, a(2)=a(1)+(A+1)+(A+2)+(A+3)=6A+9, a(3)=a(2)+(A+1)+(A+2)+(A+3)+(A+4)=10A+19, ...

LINKS

Table of n, a(n) for n=0..42.

CROSSREFS

Sequence in context: A119868 A175729 A081266 * A212656 A051941 A212707

Adjacent sequences:  A087860 A087861 A087862 * A087864 A087865 A087866

KEYWORD

nonn,easy

AUTHOR

Helmut E. Fuchs (helmut2(AT)juno.com), Oct 26 2003

EXTENSIONS

New definition from Vladeta Jovovic, Oct 27 2003

More terms from Ray Chandler, Oct 27 2003

STATUS

approved

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Last modified May 25 21:30 EDT 2013. Contains 225649 sequences.