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Search: id:A145910
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| 2, 14, 35, 65, 104, 152, 209, 275, 350, 434, 527, 629, 740, 860, 989, 1127, 1274, 1430, 1595, 1769, 1952, 2144, 2345, 2555, 2774, 3002, 3239, 3485, 3740, 4004, 4277, 4559, 4850, 5150, 5459, 5777, 6104, 6440, 6785, 7139, 7502, 7874
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OFFSET
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0,1
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FORMULA
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a(n)=2+9/2*n^2+15/2*n, with n>=0 [From Paolo P. Lava (ppl(AT)spl.at), Oct 28 2008]
a(n)=9*n+a(n-1)-6 (with a(1)=2) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 17 2009]
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EXAMPLE
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For n=2, a(2)=9*2+2-6=14; n=3, a(3)=9*3+14-6=35; n=4, a(4)=9*4+35-6=65 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 17 2009]
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CROSSREFS
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Sequence in context: A060626 A096311 A034842 this_sequence A128126 A134647 A004117
Adjacent sequences: A145907 A145908 A145909 this_sequence A145911 A145912 A145913
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KEYWORD
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nonn,new
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Oct 24 2008
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EXTENSIONS
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More terms a(11)-a(42) from Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 17 2009
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