A212215 - cp's OEIS frontend

A212215 Number of representations of n as a sum of products of pairs of positive integers >=2, n = Sum_{k=1..m} i_kj_k with 2<=i_k<=j_k, i_k<=i_{k+1}, j_k<=j_{k+1}, i_kj_k<=i_{k+1}*j_{k+1}.

n	a(n)
0	1
1	0
2	0
3	0
4	1
5	0
6	1
7	0
8	2
9	1
10	2
11	0
12	5
13	1
14	4
15	2
16	9
17	1
18	11
19	2
20	16
21	5
22	18
23	3
24	33
25	8
26	31
27	11
28	52
29	11
30	64
31	16
32	83
33	29
34	100
35	26
36	152
37	39
38	159
39	59
40	233
41	61
42	280
43	83
44	354
45	129
46	423
47	122
48	591
49	180
50	644
51	241
52	864
53	260
54	1050
55	341
56	1282
57	472
58	1523
59	490
60	2016
61	655
62	2224

[1, 0, 0, 0, 1, 0, 1, 0, 2, 1, 2, 0, 5, 1, 4, 2, 9, 1, 11, 2, 16, 5, 18, 3, 33, 8, 31, 11, 52, 11, 64, 16, 83, 29, 100, 26, 152, 39, 159, 59, 233, 61, 280, 83, 354, 129, 423, 122, 591, 180, 644, 241, 864, 260, 1050, 341, 1282, 472, 1523, 490, 2016, 655, 2224]

cp's OEIS Frontend

A212215 Number of representations of n as a sum of products of pairs of positive integers >=2, n = Sum_{k=1..m} i_kj_k with 2<=i_k<=j_k, i_k<=i_{k+1}, j_k<=j_{k+1}, i_kj_k<=i_{k+1}*j_{k+1}.

Table of values

List of values

cp's OEIS Frontend

A212215 Number of representations of n as a sum of products of pairs of positive integers >=2, n = Sum_{k=1..m} i_k*j_k with 2<=i_k<=j_k, i_k<=i_{k+1}, j_k<=j_{k+1}, i_k*j_k<=i_{k+1}*j_{k+1}.

Table of values

List of values

A212215 Number of representations of n as a sum of products of pairs of positive integers >=2, n = Sum_{k=1..m} i_kj_k with 2<=i_k<=j_k, i_k<=i_{k+1}, j_k<=j_{k+1}, i_kj_k<=i_{k+1}*j_{k+1}.