A122909 - cp's OEIS frontend

A122909 a(n) = F(n+1)F(2n+2) + F(n)F(2n).

n	a(n)
0	1
1	4
2	19
3	79
4	338
5	1427
6	6053
7	25628
8	108583
9	459931
10	1948354
11	8253271
12	34961561
13	148099316
14	627359147
15	2657535383
16	11257501522
17	47687540107
18	202007664157
19	855718193164
20	3624880442591
21	15355239954179
22	65045840274434

[1, 4, 19, 79, 338, 1427, 6053, 25628, 108583, 459931, 1948354, 8253271, 34961561, 148099316, 627359147, 2657535383, 11257501522, 47687540107, 202007664157, 855718193164, 3624880442591, 15355239954179, 65045840274434]

cp's OEIS Frontend

A122909 a(n) = F(n+1)F(2n+2) + F(n)F(2n).

Table of values

List of values

cp's OEIS Frontend

A122909 a(n) = F(n+1)*F(2n+2) + F(n)*F(2n).

Table of values

List of values

A122909 a(n) = F(n+1)F(2n+2) + F(n)F(2n).