A091024 - cp's OEIS frontend

A091024 Let v(0) be the column vector (1,0,0,0)'; for n>0, let v(n) = [1 1 1 1 / 1 1 1 0 / 1 1 0 0/ 1 0 0 0] v(n-1). Sequence gives third entry of v(n).

n	a(n)
0	0
1	1
2	2
3	7
4	19
5	56
6	160
7	462
8	1329
9	3828
10	11021
11	31735
12	91376
13	263108
14	757588
15	2181389
16	6281058
17	18085587
18	52075371
19	149945056
20	431749580
21	1243173370
22	3579575053
23	10306975580
24	29677753369
25	85453685055
26	246054079584

[0, 1, 2, 7, 19, 56, 160, 462, 1329, 3828, 11021, 31735, 91376, 263108, 757588, 2181389, 6281058, 18085587, 52075371, 149945056, 431749580, 1243173370, 3579575053, 10306975580, 29677753369, 85453685055, 246054079584]

cp's OEIS Frontend

A091024 Let v(0) be the column vector (1,0,0,0)'; for n>0, let v(n) = [1 1 1 1 / 1 1 1 0 / 1 1 0 0/ 1 0 0 0] v(n-1). Sequence gives third entry of v(n).

Table of values

List of values