A007858 - cp's OEIS frontend

A007858 G.f. is 1 - 1/f(x), where f(x) = 1+x+3x^2+9x^3+32*x^4+... is 1/x times g.f. for A063020.

n	a(n)
1	1
2	2
3	4
4	13
5	44
6	164
7	636
8	2559
9	10556
10	44440
11	190112
12	824135
13	3612244
14	15981632
15	71277736
16	320121747
17	1446537564
18	6571858168
19	30000766128
20	137544893940
21	633051803120
22	2923867281660
23	13547594977500
24	62955434735505
25	293336372858724
26	1370149533359784
27	6414423856436816

[1, 2, 4, 13, 44, 164, 636, 2559, 10556, 44440, 190112, 824135, 3612244, 15981632, 71277736, 320121747, 1446537564, 6571858168, 30000766128, 137544893940, 633051803120, 2923867281660, 13547594977500, 62955434735505, 293336372858724, 1370149533359784, 6414423856436816]

cp's OEIS Frontend

A007858 G.f. is 1 - 1/f(x), where f(x) = 1+x+3x^2+9x^3+32*x^4+... is 1/x times g.f. for A063020.

Table of values

List of values

cp's OEIS Frontend

A007858 G.f. is 1 - 1/f(x), where f(x) = 1+x+3*x^2+9*x^3+32*x^4+... is 1/x times g.f. for A063020.

Table of values

List of values

A007858 G.f. is 1 - 1/f(x), where f(x) = 1+x+3x^2+9x^3+32*x^4+... is 1/x times g.f. for A063020.