OFFSET
0,2
FORMULA
a(n) = A014633(n)^2. - Sean A. Irvine, Nov 20 2018
From Chai Wah Wu, Jan 23 2020: (Start)
a(n) = a(n-1) + 4*a(n-2) - 4*a(n-3) - 6*a(n-4) + 6*a(n-5) + 4*a(n-6) - 4*a(n-7) - a(n-8) + a(n-9) for n > 8.
G.f.: -4*x*(x^7 + 168*x^6 + 227*x^5 + 1428*x^4 + 551*x^3 + 960*x^2 + 85*x + 36)/((x - 1)^5*(x + 1)^4). (End)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
More terms from Erich Friedman.
a(0)=0 inserted for consistency with A014633 by Sean A. Irvine, Nov 20 2018
STATUS
approved