|
Search: id:A007904
|
|
|
| A007904 |
|
Crystal ball sequence for diamond. |
|
+0
2
|
|
| 1, 5, 17, 41, 83, 147, 239, 363, 525, 729, 981, 1285, 1647, 2071, 2563, 3127, 3769, 4493, 5305, 6209, 7211, 8315, 9527, 10851, 12293, 13857, 15549, 17373, 19335, 21439, 23691, 26095, 28657, 31381, 34273, 37337
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
LINKS
|
T. D. Noe, Table of n, a(n) for n=0..1000
Index entries for crystal ball sequences
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
|
G.f.: -(x^4+2*x^3+4*x^2+2*x+1)/(x-1)^2/(x^2-1)/(1-x).
|
|
CROSSREFS
|
Adjacent sequences: A007901 A007902 A007903 this_sequence A007905 A007906 A007907
Sequence in context: A091864 A109722 A097121 this_sequence A139545 A106972 A086499
|
|
KEYWORD
|
nonn,nice
|
|
AUTHOR
|
njas
|
|
|
Search completed in 0.002 seconds
|
