OFFSET
2,1
LINKS
Chai Wah Wu, Table of n, a(n) for n = 2..127
FORMULA
a(n) ~ c * r^(n*(n+1)/2), where r = A060006 = 1.324717957244746025960908854478... is the root of the equation r^3 = r + 1, c = 0.81845731383668335747954234022593868885066763327809025622515304041339344876... .
MATHEMATICA
Table[Product[SeriesCoefficient[(3-x^2)/(1-x^2-x^3), {x, 0, k}], {k, 2, n}], {n, 2, 20}]
PROG
(Python)
A254232_list, a, b, c, d = [2], 3, 0, 2, 2
for _ in range(200):
a, b, c = b, c, a+b
d *= c
A254232_list.append(d) # Chai Wah Wu, Jan 28 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Jan 27 2015
STATUS
approved