A093652 - cp's OEIS frontend

A093652 Let a(1) = 1, a(2) = 2, a(3) = 7, a(4) = 15 and for n >= 5 set a(n) = (nb(n) - b(n-2)) / 2, where b(n) = 4b(n-2) - b(n-4) for n >= 5 and b(1) = 1, b(2) = 2, b(3) = 5, b(4) = 8.

n	a(n)
1	1
2	2
3	7
4	15
5	45
6	86
7	239
8	433
9	1157
10	2034
11	5307
12	9151
13	23497
14	39974
15	101467
16	170913
17	430089
18	718946
19	1796975
20	2985775
21	7422437
22	12272502
23	30373191
24	50016721
25	123327373
26	202395986
27	497484067
28	814061151
29	1995542913
30	3257222726
31	7965875891
32	12973832257
33	31663779857

[1, 2, 7, 15, 45, 86, 239, 433, 1157, 2034, 5307, 9151, 23497, 39974, 101467, 170913, 430089, 718946, 1796975, 2985775, 7422437, 12272502, 30373191, 50016721, 123327373, 202395986, 497484067, 814061151, 1995542913, 3257222726, 7965875891, 12973832257, 31663779857]

cp's OEIS Frontend

A093652 Let a(1) = 1, a(2) = 2, a(3) = 7, a(4) = 15 and for n >= 5 set a(n) = (nb(n) - b(n-2)) / 2, where b(n) = 4b(n-2) - b(n-4) for n >= 5 and b(1) = 1, b(2) = 2, b(3) = 5, b(4) = 8.

Table of values

List of values

cp's OEIS Frontend

A093652 Let a(1) = 1, a(2) = 2, a(3) = 7, a(4) = 15 and for n >= 5 set a(n) = (n*b(n) - b(n-2)) / 2, where b(n) = 4*b(n-2) - b(n-4) for n >= 5 and b(1) = 1, b(2) = 2, b(3) = 5, b(4) = 8.

Table of values

List of values

A093652 Let a(1) = 1, a(2) = 2, a(3) = 7, a(4) = 15 and for n >= 5 set a(n) = (nb(n) - b(n-2)) / 2, where b(n) = 4b(n-2) - b(n-4) for n >= 5 and b(1) = 1, b(2) = 2, b(3) = 5, b(4) = 8.