A360856 - cp's OEIS frontend

A360856 a(n) = [x^n](1/2)(1 + (2x + 1)/sqrt(1 - 8x^2(x + 1))).

n	a(n)
0	1
1	1
2	2
3	6
4	16
5	48
6	140
7	424
8	1280
9	3920
10	12032
11	37184
12	115248
13	358624
14	1118784
15	3499584
16	10969344
17	34450944
18	108377984
19	341465344
20	1077300224
21	3403006464
22	10761447424
23	34065967104
24	107937899264
25	342293526016
26	1086339120128
27	3450236511232
28	10965437349888

[1, 1, 2, 6, 16, 48, 140, 424, 1280, 3920, 12032, 37184, 115248, 358624, 1118784, 3499584, 10969344, 34450944, 108377984, 341465344, 1077300224, 3403006464, 10761447424, 34065967104, 107937899264, 342293526016, 1086339120128, 3450236511232, 10965437349888]

cp's OEIS Frontend

A360856 a(n) = [x^n](1/2)(1 + (2x + 1)/sqrt(1 - 8x^2(x + 1))).

Table of values

List of values

cp's OEIS Frontend

A360856 a(n) = [x^n](1/2)*(1 + (2*x + 1)/sqrt(1 - 8*x^2*(x + 1))).

Table of values

List of values

A360856 a(n) = [x^n](1/2)(1 + (2x + 1)/sqrt(1 - 8x^2(x + 1))).