A217727 - cp's OEIS frontend

A217727 a(1)=2. For n >= 1, let k = floor(log a(n)). If k >= 2 and k is not already in the sequence then a(n+1)=k, otherwise a(n+1)=a(n)^2.

n	a(n)
1	2
2	4
3	16
4	256
5	5
6	25
7	3
8	9
9	81
10	6561
11	8
12	64
13	4096
14	16777216
15	281474976710656
16	33
17	1089
18	6
19	36
20	1296
21	7
22	49
23	2401
24	5764801
25	15
26	225
27	50625
28	10
29	100
30	10000
31	100000000
32	18
33	324
34	104976
35	11
36	121
37	14641
38	214358881
39	19
40	361
41	130321
42	16983563041
43	23
44	529
45	279841
46	12
47	144
48	20736
49	429981696
50	184884258895036416
51	39

[2, 4, 16, 256, 5, 25, 3, 9, 81, 6561, 8, 64, 4096, 16777216, 281474976710656, 33, 1089, 6, 36, 1296, 7, 49, 2401, 5764801, 15, 225, 50625, 10, 100, 10000, 100000000, 18, 324, 104976, 11, 121, 14641, 214358881, 19, 361, 130321, 16983563041, 23, 529, 279841, 12, 144, 20736, 429981696, 184884258895036416, 39]

cp's OEIS Frontend

A217727 a(1)=2. For n >= 1, let k = floor(log a(n)). If k >= 2 and k is not already in the sequence then a(n+1)=k, otherwise a(n+1)=a(n)^2.

Table of values

List of values