|
Search: id:A035879
|
|
|
| A035879 |
|
Coordination sequence for diamond structure D^+_6. (Edges defined by l_1 norm = 1.) |
|
+0
1
|
|
| 1, 0, 72, 32, 1104, 672, 7128, 4032, 28320, 14784, 84072, 41184, 206064, 96096, 441336, 198016, 855360, 372096, 1535112, 651168, 2592144, 1076768, 4165656, 1700160, 6425568, 2583360, 9575592, 3800160
(list; graph; listen)
|
|
|
OFFSET
|
0,3
|
|
|
REFERENCES
|
J. Serra-Sagrista, Enumeration of lattice points in l_1 norm, Information Processing Letters, 76, no. 1-2 (2000), 39-44.
|
|
LINKS
|
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).
|
|
MAPLE
|
f := proc(m) local k, t1; t1 := 2^(n-1)*binomial((n+2*m)/2-1, n-1); if m mod 2 = 0 then t1 := t1+add(2^k*binomial(n, k)*binomial(m-1, k-1), k=0..n); fi; t1; end; where n=6.
|
|
CROSSREFS
|
Sequence in context: A036206 A036178 A036187 this_sequence A033392 A110678 A008943
Adjacent sequences: A035876 A035877 A035878 this_sequence A035880 A035881 A035882
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
J. Serra-Sagrista (jserra(AT)ccd.uab.es) Recomputed by njas Nov 27 1998.
|
|
|
Search completed in 0.020 seconds
|
