A187890 - cp's OEIS frontend

A187890 a(1) = 0, a(2) = 4, a(n) = a(n-1) + a(n-2) - 1.

n	a(n)
1	0
2	4
3	3
4	6
5	8
6	13
7	20
8	32
9	51
10	82
11	132
12	213
13	344
14	556
15	899
16	1454
17	2352
18	3805
19	6156
20	9960
21	16115
22	26074
23	42188
24	68261
25	110448
26	178708
27	289155
28	467862
29	757016
30	1224877
31	1981892
32	3206768
33	5188659
34	8395426
35	13584084
36	21979509
37	35563592
38	57543100

[0, 4, 3, 6, 8, 13, 20, 32, 51, 82, 132, 213, 344, 556, 899, 1454, 2352, 3805, 6156, 9960, 16115, 26074, 42188, 68261, 110448, 178708, 289155, 467862, 757016, 1224877, 1981892, 3206768, 5188659, 8395426, 13584084, 21979509, 35563592, 57543100]

cp's OEIS Frontend

A187890 a(1) = 0, a(2) = 4, a(n) = a(n-1) + a(n-2) - 1.

Table of values

List of values