A212570 - cp's OEIS frontend

A212570 Number of (w,x,y,z) with all terms in {1,...,n} and |w-x|=|x-y|+|y-z|.

n	a(n)
0	0
1	1
2	6
3	23
4	52
5	105
6	178
7	287
8	424
9	609
10	830
11	1111
12	1436
13	1833
14	2282
15	2815
16	3408
17	4097
18	4854
19	5719
20	6660
21	7721
22	8866
23	10143
24	11512
25	13025
26	14638
27	16407
28	18284
29	20329
30	22490
31	24831
32	27296
33	29953
34	32742
35	35735
36	38868
37	42217
38	45714
39	49439

[0, 1, 6, 23, 52, 105, 178, 287, 424, 609, 830, 1111, 1436, 1833, 2282, 2815, 3408, 4097, 4854, 5719, 6660, 7721, 8866, 10143, 11512, 13025, 14638, 16407, 18284, 20329, 22490, 24831, 27296, 29953, 32742, 35735, 38868, 42217, 45714, 49439]

cp's OEIS Frontend

A212570 Number of (w,x,y,z) with all terms in {1,...,n} and |w-x|=|x-y|+|y-z|.

Table of values

List of values