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A064185
a(n) = (b(n+3) * b(n-1) * a(n-1)^2 - 1) / b(n+2) where b(n) =
A006720
(n).
0
1, 1, 1, 2, 13, 867, 12001543, 4909644519038939, 2976533007674072187623474816337374, 5305128832761583696023807632374530398637482018663107882637653612424699
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OFFSET
0,4
LINKS
Table of n, a(n) for n=0..9.
PROG
(PARI) {a(n) = if( n<1, n>=0, (b(n+3) * b(n-1) * a(n-1)^2 - 1) / b(n+2))}
CROSSREFS
Cf.
A006720
.
Sequence in context:
A119122
A109947
A175513
*
A069109
A004071
A174363
Adjacent sequences:
A064182
A064183
A064184
*
A064186
A064187
A064188
KEYWORD
nonn
,
easy
AUTHOR
Michael Somos
, Sep 20 2001
STATUS
approved
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Last modified September 9 07:24 EDT 2024. Contains 375762 sequences. (Running on oeis4.)