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A048576 Pisot sequence L(2,7). 1
2, 7, 25, 90, 324, 1167, 4204, 15145, 54561, 196561, 708130, 2551107, 9190611, 33110070, 119282248, 429725902, 1548129365, 5577286637, 20092717660, 72385969961, 260777498389, 939476306012, 3384554783333, 12193187851654, 43927145371633, 158251814371812 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Robert Israel, Table of n, a(n) for n = 0..1780

MAPLE

A[0]:= 2:

A[1]:= 7:

for n from 2 to 100 do

  A[n]:= ceil(A[n-1]^2/A[n-2])

od:

seq(A[i], i=0..100); # Robert Israel, Mar 01 2016

CROSSREFS

See A008776 for definitions of Pisot sequences.

Sequence in context: A131430 A007484 A070859 * A018907 A052936 A108152

Adjacent sequences:  A048573 A048574 A048575 * A048577 A048578 A048579

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified February 16 21:59 EST 2019. Contains 320200 sequences. (Running on oeis4.)