A339389 - cp's OEIS frontend

A339389 a(n) is the number of ordered pairs (i, j) of numbers in the range 1..n-1 such that a(i) + a(j) >= a(n-1).

n	a(n)
1	0
2	1
3	3
4	5
5	8
6	12
7	14
8	21
9	21
10	38
11	23
12	68
13	24
14	114
15	28
16	149
17	36
18	182
19	47
20	209
21	60
22	247
23	68
24	315
25	70
26	397
27	68
28	515
29	71
30	605
31	82
32	667
33	106
34	690
35	147
36	700
37	206
38	717
39	255
40	747
41	282
42	835
43	244
44	1103
45	160
46	1462
47	124
48	1751
49	131
50	1913
51	160
52	1990
53	213
54	1988
55	324
56	1771

[0, 1, 3, 5, 8, 12, 14, 21, 21, 38, 23, 68, 24, 114, 28, 149, 36, 182, 47, 209, 60, 247, 68, 315, 70, 397, 68, 515, 71, 605, 82, 667, 106, 690, 147, 700, 206, 717, 255, 747, 282, 835, 244, 1103, 160, 1462, 124, 1751, 131, 1913, 160, 1990, 213, 1988, 324, 1771]

cp's OEIS Frontend

A339389 a(n) is the number of ordered pairs (i, j) of numbers in the range 1..n-1 such that a(i) + a(j) >= a(n-1).

Table of values

List of values