0,2

a(n)=sum(C(k)*10^k, k=0..n), n>=0, with C(n):=A000108(n).

G.f.: c(10*x)/(1-x), where c(x):=(1-sqrt(1-4*x))/(2*x) is the o.g.f. of Catalan numbers A000108.

Eleventh column (m=10) of triangle A112705.

Sequence in context: A077714 A089567 A110747 this_sequence A114758 A088061 A070220

Adjacent sequences: A112701 A112702 A112703 this_sequence A112705 A112706 A112707

nonn,easy

Wolfdieter Lang (wolfdieter.lang_AT_physik_DOT_uni-karlsruhe_DOT_de), Oct 31 2005