0,2

Convolution of A089507 with powers of 60.

G.f.: 1/((1-3*2*1*x)*(1-4*3*2*x)*(1-5*4*3*x)).

a(n)=A089504(n+3, 3), n>=0.

a(n)= (50*(5*4*3)^n - 24*(4*3*2)^n + (3*2*1)^n)/27 = (6^n)*(5*10^(n+1) - 3*2^(2*n+3) + 1)/27.

Cf. A089505, A089507, A089514.

Sequence in context: A111783 A075918 A076010 this_sequence A112004 A166822 A166804

Adjacent sequences: A089510 A089511 A089512 this_sequence A089514 A089515 A089516

nonn,easy

Wolfdieter Lang (wolfdieter.lang_AT_physik_DOT_uni-karlsruhe_DOT_de), Dec 01 2003