A373504 - cp's OEIS frontend

A373504 Triangular array: row n gives the coefficients T(n,k) of powers x^(2k) in the series expansion of ((b^n + b^(-n))/2)^2, where b = x + sqrt(x^2 + 1).

n	a(n)
0	1
1	1
2	1
3	1
4	4
5	4
6	1
7	9
8	24
9	16
10	1
11	16
12	80
13	128
14	64
15	1
16	25
17	200
18	560
19	640
20	256
21	1
22	36
23	420
24	1792
25	3456
26	3072
27	1024
28	1
29	49
30	784
31	4704
32	13440
33	19712
34	14336
35	4096
36	1
37	64
38	1344
39	10752
40	42240
41	90112
42	106496
43	65536
44	16384
45	1
46	81
47	2160
48	22176
49	114048
50	329472
51	559104
52	552960
53	294912
54	65536

[1, 1, 1, 1, 4, 4, 1, 9, 24, 16, 1, 16, 80, 128, 64, 1, 25, 200, 560, 640, 256, 1, 36, 420, 1792, 3456, 3072, 1024, 1, 49, 784, 4704, 13440, 19712, 14336, 4096, 1, 64, 1344, 10752, 42240, 90112, 106496, 65536, 16384, 1, 81, 2160, 22176, 114048, 329472, 559104, 552960, 294912, 65536]

cp's OEIS Frontend

A373504 Triangular array: row n gives the coefficients T(n,k) of powers x^(2k) in the series expansion of ((b^n + b^(-n))/2)^2, where b = x + sqrt(x^2 + 1).

Table of values

List of values