A212505 - cp's OEIS frontend

A212505 Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y>=2z.

n	a(n)
0	0
1	0
2	3
3	14
4	48
5	114
6	243
7	444
8	768
9	1220
10	1875
11	2730
12	3888
13	5334
14	7203
15	9464
16	12288
17	15624
18	19683
19	24390
20	30000
21	36410
22	43923
23	52404
24	62208
25	73164
26	85683
27	99554
28	115248
29	132510
30	151875
31	173040
32	196608
33	222224
34	250563
35	281214
36	314928

[0, 0, 3, 14, 48, 114, 243, 444, 768, 1220, 1875, 2730, 3888, 5334, 7203, 9464, 12288, 15624, 19683, 24390, 30000, 36410, 43923, 52404, 62208, 73164, 85683, 99554, 115248, 132510, 151875, 173040, 196608, 222224, 250563, 281214, 314928]

cp's OEIS Frontend

A212505 Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y>=2z.

Table of values

List of values