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A048589 Pisot sequence L(7,9). 0
7, 9, 12, 16, 22, 31, 44, 63, 91, 132, 192, 280, 409, 598, 875, 1281, 1876, 2748, 4026, 5899, 8644, 12667, 18563, 27204, 39868, 58428, 85629, 125494, 183919, 269545, 395036, 578952, 848494, 1243527, 1822476, 2670967, 3914491, 5736964, 8407928, 12322416, 18059377 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

FORMULA

a(n) = 2a(n-1) - a(n-2) + a(n-3) - a(n-4) (holds at least up to n = 1000).

CROSSREFS

Subsequence of A048585. See A008776 for definitions of Pisot sequences.

Sequence in context: A029474 A075335 A020720 * A121056 A174189 A112529

Adjacent sequences:  A048586 A048587 A048588 * A048590 A048591 A048592

KEYWORD

nonn

AUTHOR

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

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Last modified February 16 16:45 EST 2012. Contains 205938 sequences.