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A022282 n*(25n-1)/2. +0
1
0, 12, 49, 111, 198, 310, 447, 609, 796, 1008, 1245, 1507, 1794, 2106, 2443, 2805, 3192, 3604, 4041, 4503, 4990, 5502, 6039, 6601, 7188, 7800, 8437, 9099, 9786, 10498, 11235, 11997, 12784, 13596, 14433 (list; graph; listen)
OFFSET

0,2

FORMULA

a(n)=25*n+a(n-1)-38 (with a(1)=0) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 14 2009]

EXAMPLE

For n=2, a(2)=25*2+0-38=12; n=3, a(3)=25*3+12-38=49; n=4, a(4)=25*4+49-38=111 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 14 2009]

CROSSREFS

Sequence in context: A002899 A077612 A041272 this_sequence A009959 A009950 A041274

Adjacent sequences: A022279 A022280 A022281 this_sequence A022283 A022284 A022285

KEYWORD

nonn,new

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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