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Search: id:A166147
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A166147 a(n)=a(n-1)+8n (with a(1)=1) +0
2
1, 17, 41, 73, 113, 161, 217, 281, 353, 433, 521, 617, 721, 833, 953, 1081, 1217, 1361, 1513, 1673, 1841, 2017, 2201, 2393, 2593, 2801, 3017, 3241, 3473, 3713, 3961, 4217, 4481, 4753, 5033, 5321, 5617, 5921, 6233, 6553, 6881, 7217, 7561, 7913, 8273, 8641 (list; graph; listen)
OFFSET

1,2

FORMULA

a(n)=-7+4*n^2+4*n, with a(1)=1 [From Paolo P. Lava (ppl(AT)spl.at), Nov 10 2009]

EXAMPLE

For n=2 a(2)=1+16=17; n=3, a(3)=17+24=41; n=4, a(4)=41+32=73

CROSSREFS

Sequence in context: A007519 A163185 A138005 this_sequence A028886 A146443 A110226

Adjacent sequences: A166144 A166145 A166146 this_sequence A166148 A166149 A166150

KEYWORD

nonn,new

AUTHOR

Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Oct 08 2009

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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