A081851 - cp's OEIS frontend

A081851 Consider recurrence b(0) = (2n+1)/4, b(n) = b(0)*ceiling(b(n-1)); sequence gives first integer reached (or -1 if no integer is ever reached).

n	a(n)
2	5
3	7
4	36
5	1711985
6	13
7	15
8	1700
9	114
10	168
11	42000323
12	275
13	324
14	58
15	62
16	23658393
17	6055
18	58311963
19	9321
20	121770
21	13760
22	135
23	141
24	1960
25	344148
26	5734229
27	3391007266515
28	8825709
29	23546737390632357
30	244
31	252
32	1526332099115586230
33	105432399233
34	27538521
35	5680

[5, 7, 36, 1711985, 13, 15, 1700, 114, 168, 42000323, 275, 324, 58, 62, 23658393, 6055, 58311963, 9321, 121770, 13760, 135, 141, 1960, 344148, 5734229, 3391007266515, 8825709, 23546737390632357, 244, 252, 1526332099115586230, 105432399233, 27538521, 5680]

cp's OEIS Frontend

A081851 Consider recurrence b(0) = (2n+1)/4, b(n) = b(0)*ceiling(b(n-1)); sequence gives first integer reached (or -1 if no integer is ever reached).

Table of values

List of values