OFFSET
0,2
COMMENTS
Inverse binomial transform of A028387.
FORMULA
a(0) = 1, a(1) = 4, a(2) = 2, a(n) = 0 for n > 2.
G.f.: 1+4*x+2*x^2.
PROG
(PARI) {concat([1, 4, 2], vector(100))}
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Klaus Brockhaus, Nov 14 2009
STATUS
approved