A082538 - cp's OEIS frontend

A082538 Number of numbers k which give 1 after applying exactly n iterations of the 3k+1 algorithm (if a number is even, divide it by 2; if it is odd, multiply by 3 and add 1). This total includes numbers k which also give 1 for a smaller number of iterations (i.e., for this sequence we do not assume the algorithm halts when 1 is reached).

n	a(n)
0	1
1	1
2	1
3	2
4	2
5	3
6	4
7	6
8	7
9	10
10	12
11	15
12	20
13	26
14	33
15	44
16	55
17	69
18	88
19	113
20	141
21	179
22	226
23	284
24	358
25	453
26	571
27	724
28	913
29	1149
30	1456
31	1839
32	2323
33	2945
34	3718
35	4688
36	5933
37	7498
38	9476
39	11982
40	15126
41	19111
42	24172
43	30535
44	38563
45	48733
46	61560
47	77792
48	98313
49	124240

[1, 1, 1, 2, 2, 3, 4, 6, 7, 10, 12, 15, 20, 26, 33, 44, 55, 69, 88, 113, 141, 179, 226, 284, 358, 453, 571, 724, 913, 1149, 1456, 1839, 2323, 2945, 3718, 4688, 5933, 7498, 9476, 11982, 15126, 19111, 24172, 30535, 38563, 48733, 61560, 77792, 98313, 124240]

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Table of values

List of values