0,2

T. D. Noe, Table of n, a(n) for n=0..1000

J. H. Conway and N. J. A. Sloane, Low-Dimensional Lattices VII: Coordination Sequences, Proc. Royal Soc. London, A453 (1997), 2369-2389 (Abstract, pdf, ps).

G.f.: (x+1)*(x^6+624*x^5+1959*x^4+1744*x^3+519*x^2+48*x+1)/(1-x)^7.

68/5*n^6-216/5*n^5+148*n^4-192*n^3+902/5*n^2-264/5*n+2;

Adjacent sequences: A008918 A008919 A008920 this_sequence A008922 A008923 A008924

Sequence in context: A138410 A105940 A008389 this_sequence A114059 A002009 A140901

nonn

njas