A212415 - cp's OEIS frontend

A212415 Number of (w,x,y,z) with all terms in {1,...,n} and w=y<=z.

n	a(n)
0	0
1	0
2	3
3	17
4	55
5	135
6	280
7	518
8	882
9	1410
10	2145
11	3135
12	4433
13	6097
14	8190
15	10780
16	13940
17	17748
18	22287
19	27645
20	33915
21	41195
22	49588
23	59202
24	70150
25	82550
26	96525
27	112203
28	129717
29	149205
30	170810
31	194680
32	220968
33	249832
34	281435
35	315945

[0, 0, 3, 17, 55, 135, 280, 518, 882, 1410, 2145, 3135, 4433, 6097, 8190, 10780, 13940, 17748, 22287, 27645, 33915, 41195, 49588, 59202, 70150, 82550, 96525, 112203, 129717, 149205, 170810, 194680, 220968, 249832, 281435, 315945]

cp's OEIS Frontend

A212415 Number of (w,x,y,z) with all terms in {1,...,n} and w=y<=z.

Table of values

List of values