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A020720 Pisot sequences E(7,9), P(7,9). +0
2
7, 9, 12, 16, 21, 28, 37, 49, 65, 86, 114, 151, 200, 265, 351, 465, 616, 816, 1081, 1432, 1897, 2513, 3329, 4410, 5842, 7739, 10252, 13581, 17991, 23833, 31572, 41824, 55405, 73396, 97229, 128801, 170625, 226030, 299426, 396655, 525456, 696081, 922111, 1221537 (list; graph; listen)
OFFSET

0,1

FORMULA

a(n) = a(n-2) + a(n-3) (holds at least up to n = 1000).

CROSSREFS

Subsequence of A000931. See A008776 for definitions of Pisot sequences.

Sequence in context: A023180 A029474 A075335 this_sequence A048589 A121056 A112529

Adjacent sequences: A020717 A020718 A020719 this_sequence A020721 A020722 A020723

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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Last modified November 24 14:25 EST 2009. Contains 167438 sequences.


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