OFFSET
1,2
FORMULA
Conjecture: G.f. x*(1+3*x+11*x^2+50*x^3+274*x^4+154*x^5+188*x^6+324*x^7+576*x^8) / (-1+120*x^5)^2 with a(n) = 240*a(n-5) -14400*a(n-10). - R. J. Mathar, Jul 02 2013
MATHEMATICA
f[k_] := 1 + Mod[k + 4, 5];
t[n_] := Table[f[k], {k, 1, n}]
a[n_] := SymmetricPolynomial[n - 1, t[n]]
Table[a[n], {n, 1, 33}] (* A203166 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Dec 30 2011
STATUS
approved