A005510 - cp's OEIS frontend

A005510 a(n) = 1 + a(floor(n/2))*a(ceiling(n/2)) for n > 1, a(1) = 3.

n	a(n)
1	3
2	10
3	31
4	101
5	311
6	962
7	3132
8	10202
9	31412
10	96722
11	299183
12	925445
13	3012985
14	9809425
15	31952665
16	104080805
17	320465225
18	986713745
19	3038231465
20	9355145285
21	28937578127
22	89510467490
23	276877411436
24	856448448026
25	2788351903326
26	9078078610226
27	29555650383626

[3, 10, 31, 101, 311, 962, 3132, 10202, 31412, 96722, 299183, 925445, 3012985, 9809425, 31952665, 104080805, 320465225, 986713745, 3038231465, 9355145285, 28937578127, 89510467490, 276877411436, 856448448026, 2788351903326, 9078078610226, 29555650383626]

cp's OEIS Frontend

A005510 a(n) = 1 + a(floor(n/2))*a(ceiling(n/2)) for n > 1, a(1) = 3.

Table of values

List of values