A078418 - cp's OEIS frontend

A078418 Numbers k such that h(k) = h(k-1) + h(k-2), where h(k) = A006577(k) + 1 is the length of the sequence {k, f(k), f(f(k)), ...., 1} in the Collatz (or 3x + 1) problem. (The earliest "1" is meant.)

n	a(n)
1	6
2	22
3	97
4	108
5	114
6	495
7	559
8	2972
9	3092
10	3124
11	3147
12	3154
13	3329
14	3367
15	3483
16	3643
17	3711
18	3748
19	3756
20	3982
21	4009
22	4767
23	17435
24	17782
25	17796
26	17863
27	17892
28	17897
29	18079
30	18139
31	18422
32	18580
33	18644
34	18688
35	18784
36	18804
37	18952
38	19739
39	19868

[6, 22, 97, 108, 114, 495, 559, 2972, 3092, 3124, 3147, 3154, 3329, 3367, 3483, 3643, 3711, 3748, 3756, 3982, 4009, 4767, 17435, 17782, 17796, 17863, 17892, 17897, 18079, 18139, 18422, 18580, 18644, 18688, 18784, 18804, 18952, 19739, 19868]

cp's OEIS Frontend

A078418 Numbers k such that h(k) = h(k-1) + h(k-2), where h(k) = A006577(k) + 1 is the length of the sequence {k, f(k), f(f(k)), ...., 1} in the Collatz (or 3x + 1) problem. (The earliest "1" is meant.)

Table of values

List of values