

A020743


Pisot sequence L(7,10).


3



7, 10, 15, 23, 36, 57, 91, 146, 235, 379, 612, 989, 1599, 2586, 4183, 6767, 10948, 17713, 28659, 46370, 75027, 121395, 196420, 317813, 514231, 832042, 1346271, 2178311, 3524580, 5702889, 9227467, 14930354, 24157819, 39088171, 63245988, 102334157, 165580143
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OFFSET

0,1


LINKS

Colin Barker, Table of n, a(n) for n = 0..1000
Index entries for Pisot sequences
Index entries for linear recurrences with constant coefficients, signature (2,0,1).


FORMULA

a(n) = Fib(n+5)+2 = A157725(n+5). a(n) = 2a(n1)  a(n3).


PROG

(PARI) pisotL(nmax, a1, a2) = {
a=vector(nmax); a[1]=a1; a[2]=a2;
for(n=3, nmax, a[n] = ceil(a[n1]^2/a[n2]));
a
}
pisotL(50, 7, 10) \\ Colin Barker, Aug 07 2016


CROSSREFS

Subsequence of A018910. See A008776 for definitions of Pisot sequences.
Cf. A020717.
Sequence in context: A155716 A025002 A120136 * A088350 A085382 A083390
Adjacent sequences: A020740 A020741 A020742 * A020744 A020745 A020746


KEYWORD

nonn,easy


AUTHOR

David W. Wilson


STATUS

approved



