A318123 - cp's OEIS frontend

A318123 a(0) = a(1) = 1; a(n) = Sum_{k=0..n-2} lcm(a(k), a(n-k-2)).

n	a(n)
0	1
1	1
2	1
3	2
4	3
5	6
6	11
7	22
8	42
9	90
10	165
11	364
12	710
13	1586
14	2885
15	6288
16	12546
17	28686
18	55406
19	130284
20	261016
21	555716
22	1149559
23	2552096
24	5429610
25	11510594
26	23650462
27	54063580
28	109053128
29	262968892
30	501771275
31	1192348336
32	2635608642
33	5766609158
34	11935917602
35	28867050172
36	58702673480

[1, 1, 1, 2, 3, 6, 11, 22, 42, 90, 165, 364, 710, 1586, 2885, 6288, 12546, 28686, 55406, 130284, 261016, 555716, 1149559, 2552096, 5429610, 11510594, 23650462, 54063580, 109053128, 262968892, 501771275, 1192348336, 2635608642, 5766609158, 11935917602, 28867050172, 58702673480]

cp's OEIS Frontend

A318123 a(0) = a(1) = 1; a(n) = Sum_{k=0..n-2} lcm(a(k), a(n-k-2)).

Table of values

List of values