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Search: id:A082111
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| 1, 7, 15, 25, 37, 51, 67, 85, 105, 127, 151, 177, 205, 235, 267, 301, 337, 375, 415, 457, 501, 547, 595, 645, 697, 751, 807, 865, 925, 987, 1051, 1117, 1185, 1255, 1327, 1401, 1477, 1555, 1635, 1717, 1801, 1887, 1975, 2065, 2157, 2251, 2347, 2445, 2545, 2647
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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a(n)=n^2+5n+1
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MAPLE
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a:=array(1...50): a[1]:=1: print(1, a[1]); for i from 2 to 50 do a[i]:= a[i-1]+(2*binomial(i+1, i)):print(i, a[i]); od: - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 27 2007
with (combinat):with (combinat):seq(fibonacci(3, n)+n-6, n=2..51); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 07 2008
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CROSSREFS
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Cf. A028872, A028387.
Cf. A002522.
Sequence in context: A113505 A076796 A056119 this_sequence A012480 A063611 A006188
Adjacent sequences: A082108 A082109 A082110 this_sequence A082112 A082113 A082114
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KEYWORD
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easy,nonn
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Apr 04 2003
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