A212561 - cp's OEIS frontend

A212561 Number of (w,x,y,z) with all terms in {1,...,n} and w + x = 2y + 2z.

n	a(n)
0	0
1	0
2	1
3	5
4	12
5	26
6	45
7	75
8	112
9	164
10	225
11	305
12	396
13	510
14	637
15	791
16	960
17	1160
18	1377
19	1629
20	1900
21	2210
22	2541
23	2915
24	3312
25	3756
26	4225
27	4745
28	5292
29	5894
30	6525
31	7215
32	7936
33	8720
34	9537
35	10421
36	11340
37	12330
38	13357
39	14459
40	15600
41	16820
42	18081
43	19425

[0, 0, 1, 5, 12, 26, 45, 75, 112, 164, 225, 305, 396, 510, 637, 791, 960, 1160, 1377, 1629, 1900, 2210, 2541, 2915, 3312, 3756, 4225, 4745, 5292, 5894, 6525, 7215, 7936, 8720, 9537, 10421, 11340, 12330, 13357, 14459, 15600, 16820, 18081, 19425]

cp's OEIS Frontend

A212561 Number of (w,x,y,z) with all terms in {1,...,n} and w + x = 2y + 2z.

Table of values

List of values