A212578 - cp's OEIS frontend

A212578 Number of (w,x,y,z) with all terms in {1,...,n} and |w-x| = 2*|x-y| - |y-z|.

n	a(n)
0	0
1	1
2	4
3	13
4	28
5	55
6	92
7	147
8	216
9	309
10	420
11	561
12	724
13	923
14	1148
15	1415
16	1712
17	2057
18	2436
19	2869
20	3340
21	3871
22	4444
23	5083
24	5768
25	6525
26	7332
27	8217
28	9156
29	10179
30	11260
31	12431
32	13664
33	14993
34	16388
35	17885
36	19452
37	21127
38	22876
39	24739
40	26680
41	28741

[0, 1, 4, 13, 28, 55, 92, 147, 216, 309, 420, 561, 724, 923, 1148, 1415, 1712, 2057, 2436, 2869, 3340, 3871, 4444, 5083, 5768, 6525, 7332, 8217, 9156, 10179, 11260, 12431, 13664, 14993, 16388, 17885, 19452, 21127, 22876, 24739, 26680, 28741]

cp's OEIS Frontend

A212578 Number of (w,x,y,z) with all terms in {1,...,n} and |w-x| = 2*|x-y| - |y-z|.

Table of values

List of values