A268486 - cp's OEIS frontend

A268486 Least k starting a chain of (2n+1) consecutive integers {h(k+i)}, i=0,1,...,2n, where h(k) is the length of the finite set {k, f(k), f(f(k)), ..., 1} in the Collatz (or 3x + 1) problem, with the property that h(k) = h(k+2n), h(k+1) = h(k+2n-1), ..., h(k+n-1) = h(k+n+1).

n	a(n)
1	24
2	48
3	230
4	229
5	228
6	2987
7	7083
8	7083
9	14168
10	15959
11	57346
12	57346
13	119388
14	182852
15	365740
16	365739
17	365738
18	596310
19	596310
20	1088124
21	1088123
22	2901713
23	2901712
24	3264428
25	3264428

[24, 48, 230, 229, 228, 2987, 7083, 7083, 14168, 15959, 57346, 57346, 119388, 182852, 365740, 365739, 365738, 596310, 596310, 1088124, 1088123, 2901713, 2901712, 3264428, 3264428]

cp's OEIS Frontend

A268486 Least k starting a chain of (2n+1) consecutive integers {h(k+i)}, i=0,1,...,2n, where h(k) is the length of the finite set {k, f(k), f(f(k)), ..., 1} in the Collatz (or 3x + 1) problem, with the property that h(k) = h(k+2n), h(k+1) = h(k+2n-1), ..., h(k+n-1) = h(k+n+1).

Table of values

List of values