A317973 - cp's OEIS frontend

A317973 a(n) = 2*(a(n-1)+a(n-2)+a(n-3))-a(n-4) for n >= 4, with initial terms -1, 2, 3, 6.

n	a(n)
0	-1
1	2
2	3
3	6
4	23
5	62
6	179
7	522
8	1503
9	4346
10	12563
11	36302
12	104919
13	303222
14	876323
15	2532626
16	7319423
17	21153522
18	61134819
19	176682902
20	510623063
21	1475728046
22	4264933203
23	12325885722
24	35622470879
25	102950851562
26	297533483123
27	859887725406
28	2485121649303
29	7182134864102

[-1, 2, 3, 6, 23, 62, 179, 522, 1503, 4346, 12563, 36302, 104919, 303222, 876323, 2532626, 7319423, 21153522, 61134819, 176682902, 510623063, 1475728046, 4264933203, 12325885722, 35622470879, 102950851562, 297533483123, 859887725406, 2485121649303, 7182134864102]

cp's OEIS Frontend

A317973 a(n) = 2*(a(n-1)+a(n-2)+a(n-3))-a(n-4) for n >= 4, with initial terms -1, 2, 3, 6.

Table of values

List of values