A212681 - cp's OEIS frontend

A212681 Number of (w,x,y,z) with all terms in {1,...,n} and |x-y|<|y-z|.

n	a(n)
0	0
1	0
2	4
3	24
4	88
5	230
6	504
7	966
8	1696
9	2772
10	4300
11	6380
12	9144
13	12714
14	17248
15	22890
16	29824
17	38216
18	48276
19	60192
20	74200
21	90510
22	109384
23	131054
24	155808
25	183900
26	215644
27	251316
28	291256
29	335762
30	385200
31	439890
32	500224
33	566544
34	639268

[0, 0, 4, 24, 88, 230, 504, 966, 1696, 2772, 4300, 6380, 9144, 12714, 17248, 22890, 29824, 38216, 48276, 60192, 74200, 90510, 109384, 131054, 155808, 183900, 215644, 251316, 291256, 335762, 385200, 439890, 500224, 566544, 639268]

cp's OEIS Frontend

A212681 Number of (w,x,y,z) with all terms in {1,...,n} and |x-y|<|y-z|.

Table of values

List of values