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Search: id:A082108
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| 1, 11, 29, 55, 89, 131, 181, 239, 305, 379, 461, 551, 649, 755, 869, 991, 1121, 1259, 1405, 1559, 1721, 1891, 2069, 2255, 2449, 2651, 2861, 3079, 3305, 3539, 3781, 4031, 4289, 4555, 4829, 5111, 5401, 5699, 6005, 6319, 6641, 6971, 7309, 7655, 8009, 8371
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Conjecture. a(n-1) is the largest integer such that Sum[a(k)/(2k)!, k=1,2,...,n] is less than 1 for n=1,2,3,... . - John W. Layman (layman(AT)math.vt.edu), Jun 26 2008
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FORMULA
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a(n)=4n^2+6n+1
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CROSSREFS
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Cf. A028387, A069131.
Sequence in context: A031338 A049229 A039316 this_sequence A024846 A024842 A031072
Adjacent sequences: A082105 A082106 A082107 this_sequence A082109 A082110 A082111
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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 03 2003
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