A212246 - cp's OEIS frontend

A212246 Number of (w,x,y,z) with all terms in {1,...,n} and w <= x > y <= z.

n	a(n)
0	0
1	0
2	4
3	21
4	65
5	155
6	315
7	574
8	966
9	1530
10	2310
11	3355
12	4719
13	6461
14	8645
15	11340
16	14620
17	18564
18	23256
19	28785
20	35245
21	42735
22	51359
23	61226
24	72450
25	85150
26	99450
27	115479
28	133371
29	153265
30	175305
31	199640
32	226424
33	255816
34	287980
35	323085

[0, 0, 4, 21, 65, 155, 315, 574, 966, 1530, 2310, 3355, 4719, 6461, 8645, 11340, 14620, 18564, 23256, 28785, 35245, 42735, 51359, 61226, 72450, 85150, 99450, 115479, 133371, 153265, 175305, 199640, 226424, 255816, 287980, 323085]

cp's OEIS Frontend

A212246 Number of (w,x,y,z) with all terms in {1,...,n} and w <= x > y <= z.

Table of values

List of values