A317188 - cp's OEIS frontend

A317188 a(n) = 1 + 2 * (a(n-1) + a(n-4) + a(n-6)) + a(n-7) for n>3, with initial values 0 if n<0, and 1,3,8,18 for n=0..3.

n	a(n)
0	1
1	3
2	8
3	18
4	39
5	85
6	189
7	422
8	942
9	2099
10	4673
11	10400
12	23148
13	51528
14	114709
15	255359
16	568460
17	1265450
18	2817015
19	6270953
20	13959773
21	31075874
22	69178058
23	153997383
24	342813793
25	763138256
26	1698823128
27	3781752544
28	8418564665
29	18740578667
30	41718428560
31	92869452514

[1, 3, 8, 18, 39, 85, 189, 422, 942, 2099, 4673, 10400, 23148, 51528, 114709, 255359, 568460, 1265450, 2817015, 6270953, 13959773, 31075874, 69178058, 153997383, 342813793, 763138256, 1698823128, 3781752544, 8418564665, 18740578667, 41718428560, 92869452514]

cp's OEIS Frontend

A317188 a(n) = 1 + 2 * (a(n-1) + a(n-4) + a(n-6)) + a(n-7) for n>3, with initial values 0 if n<0, and 1,3,8,18 for n=0..3.

Table of values

List of values