A339773 - cp's OEIS frontend

A339773 a(n) is the first number k such that the n Collatz runs starting at the consecutive numbers k, k+1, ..., k+n-1 all have the same prime-valued height while the runs starting at k-1 and k+n have nonprime heights.

n	a(n)
1	25
2	14
3	108
4	314
5	1154
6	840
7	3360
8	1494
9	24408
10	4722
11	6576
12	33578
13	124097
14	61442
15	99248
16	104879
17	228296
18	302956
19	203436
20	269698
21	106122
22	470826
23	614402
24	701224
25	589826
26	1369884
27	252548
28	1377184
29	3126172
30	1356161
31	1370050
32	1591584
33	2065786
34	8363804
35	2054827

[25, 14, 108, 314, 1154, 840, 3360, 1494, 24408, 4722, 6576, 33578, 124097, 61442, 99248, 104879, 228296, 302956, 203436, 269698, 106122, 470826, 614402, 701224, 589826, 1369884, 252548, 1377184, 3126172, 1356161, 1370050, 1591584, 2065786, 8363804, 2054827]

cp's OEIS Frontend

A339773 a(n) is the first number k such that the n Collatz runs starting at the consecutive numbers k, k+1, ..., k+n-1 all have the same prime-valued height while the runs starting at k-1 and k+n have nonprime heights.

Table of values

List of values