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Search: id:A082645
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A082645 Floor((2*n^2+n-4)/4). +0
1
-1, -1, 1, 4, 8, 12, 18, 25, 33, 41, 51, 62, 74, 86, 100, 115, 131, 147, 165, 184, 204, 224, 246, 269, 293, 317, 343, 370, 398, 426, 456, 487, 519, 551, 585, 620, 656, 692, 730, 769, 809, 849, 891, 934, 978, 1022, 1068, 1115, 1163, 1211, 1261, 1312, 1364, 1416, 1470, 1525 (list; graph; listen)
OFFSET

0,4

CROSSREFS

Sequence in context: A049621 A072511 A156324 this_sequence A111201 A145203 A045750

Adjacent sequences: A082642 A082643 A082644 this_sequence A082646 A082647 A082648

KEYWORD

sign

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), May 16 2003

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.


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