OFFSET
1,2
COMMENTS
Row 5 of A188784.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..43
FORMULA
Empirical: a(n) = 2696*n^4 - 9968*n^3 + 11424*n^2 - 4416*n + 384 for n>3.
Conjectures from Colin Barker, Apr 29 2018: (Start)
G.f.: 8*x^2*(192 + 3966*x + 4506*x^2 - 877*x^3 + 305*x^4 + 23*x^5 - 27*x^6) / (1 - x)^5.
a(n) = 5*a(n-1) - 10*a(n-2) + 10*a(n-3) - 5*a(n-4) + a(n-5) for n>7.
(End)
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 10 2011
STATUS
approved