A108558 - cp's OEIS frontend

A108558 Symmetric triangle, read by rows, where row n equals the (n+1)-th differences of the crystal ball sequence for D_n lattice, for n>=0.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	9
8	9
9	1
10	1
11	20
12	54
13	20
14	1
15	1
16	35
17	180
18	180
19	35
20	1
21	1
22	54
23	447
24	852
25	447
26	54
27	1
28	1
29	77
30	931
31	2863
32	2863
33	931
34	77
35	1
36	1
37	104
38	1724
39	7768
40	12550
41	7768
42	1724
43	104
44	1
45	1
46	135
47	2934
48	18186
49	43128
50	43128
51	18186
52	2934
53	135
54	1
55	1
56	170
57	4685
58	38200
59	124850
60	183356
61	124850
62	38200
63	4685
64	170
65	1

[1, 1, 1, 1, 2, 1, 1, 9, 9, 1, 1, 20, 54, 20, 1, 1, 35, 180, 180, 35, 1, 1, 54, 447, 852, 447, 54, 1, 1, 77, 931, 2863, 2863, 931, 77, 1, 1, 104, 1724, 7768, 12550, 7768, 1724, 104, 1, 1, 135, 2934, 18186, 43128, 43128, 18186, 2934, 135, 1, 1, 170, 4685, 38200, 124850, 183356, 124850, 38200, 4685, 170, 1]

cp's OEIS Frontend

A108558 Symmetric triangle, read by rows, where row n equals the (n+1)-th differences of the crystal ball sequence for D_n lattice, for n>=0.

Table of values

List of values