OFFSET
0,3
LINKS
Eric Weisstein's World of Mathematics, Pell Number
FORMULA
G.f.: Product_{k>=1} 1/(1 - x^A000129(k)).
EXAMPLE
a(5) = 4 because we have [5], [2, 2, 1], [2, 1, 1, 1] and [1, 1, 1, 1, 1].
MATHEMATICA
CoefficientList[Series[Product[1/(1 - x^Fibonacci[k, 2]), {k, 1, 15}], {x, 0, 67}], x]
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Aug 11 2017
STATUS
approved