A006356 - cp's OEIS frontend

A006356 a(n) = 2*a(n-1) + a(n-2) - a(n-3) for n >= 3, starting with a(0) = 1, a(1) = 3, and a(2) = 6.

n	a(n)
0	1
1	3
2	6
3	14
4	31
5	70
6	157
7	353
8	793
9	1782
10	4004
11	8997
12	20216
13	45425
14	102069
15	229347
16	515338
17	1157954
18	2601899
19	5846414
20	13136773
21	29518061
22	66326481
23	149034250
24	334876920
25	752461609
26	1690765888
27	3799116465
28	8536537209
29	19181424995

[1, 3, 6, 14, 31, 70, 157, 353, 793, 1782, 4004, 8997, 20216, 45425, 102069, 229347, 515338, 1157954, 2601899, 5846414, 13136773, 29518061, 66326481, 149034250, 334876920, 752461609, 1690765888, 3799116465, 8536537209, 19181424995]

cp's OEIS Frontend

A006356 a(n) = 2*a(n-1) + a(n-2) - a(n-3) for n >= 3, starting with a(0) = 1, a(1) = 3, and a(2) = 6.

Table of values

List of values