A323210 - cp's OEIS frontend

A323210 a(n) = 9*J(n)^2 where J(n) are the Jacobsthal numbers A001045 with J(0) = 1.

n	a(n)
0	1
1	9
2	9
3	81
4	225
5	1089
6	3969
7	16641
8	65025
9	263169
10	1046529
11	4198401
12	16769025
13	67125249
14	268402689
15	1073807361
16	4294836225
17	17180131329
18	68718952449
19	274878955521
20	1099509530625
21	4398050705409
22	17592177655809
23	70368760954881
24	281474943156225
25	1125899973951489

[1, 9, 9, 81, 225, 1089, 3969, 16641, 65025, 263169, 1046529, 4198401, 16769025, 67125249, 268402689, 1073807361, 4294836225, 17180131329, 68718952449, 274878955521, 1099509530625, 4398050705409, 17592177655809, 70368760954881, 281474943156225, 1125899973951489]

cp's OEIS Frontend

A323210 a(n) = 9*J(n)^2 where J(n) are the Jacobsthal numbers A001045 with J(0) = 1.

Table of values

List of values