A256994 - cp's OEIS frontend

A256994 a(n) = n + 1 when n <= 3, otherwise a(n) = 2^(n-2) + 3; also iterates of A005187 starting from a(1) = 2.

n	a(n)
1	2
2	3
3	4
4	7
5	11
6	19
7	35
8	67
9	131
10	259
11	515
12	1027
13	2051
14	4099
15	8195
16	16387
17	32771
18	65539
19	131075
20	262147
21	524291
22	1048579
23	2097155
24	4194307
25	8388611
26	16777219
27	33554435
28	67108867
29	134217731
30	268435459
31	536870915
32	1073741827
33	2147483651
34	4294967299
35	8589934595
36	17179869187
37	34359738371
38	68719476739
39	137438953475
40	274877906947

[2, 3, 4, 7, 11, 19, 35, 67, 131, 259, 515, 1027, 2051, 4099, 8195, 16387, 32771, 65539, 131075, 262147, 524291, 1048579, 2097155, 4194307, 8388611, 16777219, 33554435, 67108867, 134217731, 268435459, 536870915, 1073741827, 2147483651, 4294967299, 8589934595, 17179869187, 34359738371, 68719476739, 137438953475, 274877906947]

cp's OEIS Frontend

A256994 a(n) = n + 1 when n <= 3, otherwise a(n) = 2^(n-2) + 3; also iterates of A005187 starting from a(1) = 2.

Table of values

List of values