A370857 - cp's OEIS frontend

A370857 Let L_1 = (1) and L_2 = (1, 2); for any n > 2, L_n is obtained by inserting one n between each pair of consecutive terms of L_{n-1} coprime to n; a(n) gives the number of n's in L_n.

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	7
8	9
9	19
10	13
11	55
12	21
13	131
14	157
15	303
16	317
17	1039
18	393
19	2471
20	2505
21	5643
22	6145
23	19235
24	7413
25	40235
26	51905
27	110435
28	110683
29	359141
30	45877
31	764159
32	1077437
33	2253143
34	2251065
35	6699111
36	2200709
37	16009783
38	20505321
39	43172899
40	29699143
41	125396929

[1, 1, 1, 1, 3, 1, 7, 9, 19, 13, 55, 21, 131, 157, 303, 317, 1039, 393, 2471, 2505, 5643, 6145, 19235, 7413, 40235, 51905, 110435, 110683, 359141, 45877, 764159, 1077437, 2253143, 2251065, 6699111, 2200709, 16009783, 20505321, 43172899, 29699143, 125396929]

cp's OEIS Frontend

A370857 Let L_1 = (1) and L_2 = (1, 2); for any n > 2, L_n is obtained by inserting one n between each pair of consecutive terms of L_{n-1} coprime to n; a(n) gives the number of n's in L_n.

Table of values

List of values