A225689 - cp's OEIS frontend

A225689 E.g.f.: sec(x)^2tan(x)+sec(x)tan(x)^2.

n	a(n)
0	0
1	1
2	2
3	8
4	28
5	136
6	662
7	3968
8	24568
9	176896
10	1326122
11	11184128
12	98329108
13	951878656
14	9596075582
15	104932671488
16	1192744081648
17	14544442556416
18	183983154281042
19	2475749026562048
20	34489251602450188
21	507711943253426176
22	7722592644581974502
23	123460740095103991808
24	2035778987564783402728

[0, 1, 2, 8, 28, 136, 662, 3968, 24568, 176896, 1326122, 11184128, 98329108, 951878656, 9596075582, 104932671488, 1192744081648, 14544442556416, 183983154281042, 2475749026562048, 34489251602450188, 507711943253426176, 7722592644581974502, 123460740095103991808, 2035778987564783402728]

cp's OEIS Frontend

A225689 E.g.f.: sec(x)^2tan(x)+sec(x)tan(x)^2.

Table of values

List of values

cp's OEIS Frontend

A225689 E.g.f.: sec(x)^2*tan(x)+sec(x)*tan(x)^2.

Table of values

List of values

A225689 E.g.f.: sec(x)^2tan(x)+sec(x)tan(x)^2.