OFFSET
0,3
LINKS
EXAMPLE
a(1) = 0 + 1 = 1.
a(2) = -1 + 2 + 1 = 2.
a(3) = 0 + 3 + 4 + 1 = 8.
MATHEMATICA
Table[Sum[ChebyshevU[k, n - k], {k, 0, n}], {n, 0, 30}] (* Vaclav Kotesovec, Jan 20 2019 *)
PROG
(PARI) {a(n) = sum(k=0, n, polchebyshev(k, 2, n-k))}
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Jan 20 2019
STATUS
approved