0,21
(Maple) a := n -> (Matrix(20, (i, j)-> if (i=j-1) or (j=1 and member (i, [k$k=10..20])) then 1 else 0 fi)^n)[1, 1]; seq (a(n), n=0..58); [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Aug 04 2008]
Sequence in context: A034138 A011879 A011878 this_sequence A118868 A017885 A011874
Adjacent sequences: A017893 A017894 A017895 this_sequence A017897 A017898 A017899
nonn
njas
Search completed in 0.002 seconds