A000257 - cp's OEIS frontend

A000257 Number of rooted bicubic maps: a(n) = (8n-4)a(n-1)/(n+2) for n >= 2, a(0) = a(1) = 1.

n	a(n)
0	1
1	1
2	3
3	12
4	56
5	288
6	1584
7	9152
8	54912
9	339456
10	2149888
11	13891584
12	91287552
13	608583680
14	4107939840
15	28030648320
16	193100021760
17	1341536993280
18	9390758952960
19	66182491668480
20	469294031831040
21	3346270487838720
22	23981605162844160
23	172667557172477952

[1, 1, 3, 12, 56, 288, 1584, 9152, 54912, 339456, 2149888, 13891584, 91287552, 608583680, 4107939840, 28030648320, 193100021760, 1341536993280, 9390758952960, 66182491668480, 469294031831040, 3346270487838720, 23981605162844160, 172667557172477952]

cp's OEIS Frontend

A000257 Number of rooted bicubic maps: a(n) = (8n-4)a(n-1)/(n+2) for n >= 2, a(0) = a(1) = 1.

Table of values

List of values

cp's OEIS Frontend

A000257 Number of rooted bicubic maps: a(n) = (8*n-4)*a(n-1)/(n+2) for n >= 2, a(0) = a(1) = 1.

Table of values

List of values

A000257 Number of rooted bicubic maps: a(n) = (8n-4)a(n-1)/(n+2) for n >= 2, a(0) = a(1) = 1.