A212510 - cp's OEIS frontend

A212510 Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y>3z.

n	a(n)
0	0
1	0
2	0
3	0
4	12
5	38
6	81
7	185
8	336
9	549
10	900
11	1365
12	1944
13	2794
14	3822
15	5070
16	6720
17	8680
18	10935
19	13821
20	17100
21	20853
22	25410
23	30569
24	36288
25	43148
26	50700
27	59076
28	68796
29	79506
30	91125
31	104545
32	119040
33	134805
34	152592
35	171853
36	192456
37	215670
38	240426
39	266994
40	296400
41	327860

[0, 0, 0, 0, 12, 38, 81, 185, 336, 549, 900, 1365, 1944, 2794, 3822, 5070, 6720, 8680, 10935, 13821, 17100, 20853, 25410, 30569, 36288, 43148, 50700, 59076, 68796, 79506, 91125, 104545, 119040, 134805, 152592, 171853, 192456, 215670, 240426, 266994, 296400, 327860]

cp's OEIS Frontend

A212510 Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y>3z.

Table of values

List of values