A370858 - cp's OEIS frontend

A370858 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 terms in L_n.

n	a(n)
1	1
2	2
3	3
4	4
5	7
6	8
7	15
8	24
9	43
10	56
11	111
12	132
13	263
14	420
15	723
16	1040
17	2079
18	2472
19	4943
20	7448
21	13091
22	19236
23	38471
24	45884
25	86119
26	138024
27	248459
28	359142
29	718283
30	764160
31	1528319
32	2605756
33	4858899
34	7109964
35	13809075
36	16009784
37	32019567
38	52524888
39	95697787
40	125396930

[1, 2, 3, 4, 7, 8, 15, 24, 43, 56, 111, 132, 263, 420, 723, 1040, 2079, 2472, 4943, 7448, 13091, 19236, 38471, 45884, 86119, 138024, 248459, 359142, 718283, 764160, 1528319, 2605756, 4858899, 7109964, 13809075, 16009784, 32019567, 52524888, 95697787, 125396930]

cp's OEIS Frontend

A370858 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 terms in L_n.

Table of values

List of values