0,2
Table of n, a(n) for n=0..15.
a(n) = (28*12^(n+3) - 105*10^(n+3) + 80*9^(n+3) - 3*2^(n+3))/1680. [Yahia Kahloune, May 22 2013]
Sequence in context: A028103 A028144 A028098 * A028020 A025130 A081141
Adjacent sequences: A028019 A028020 A028021 * A028023 A028024 A028025
nonn
N. J. A. Sloane.
approved