A357282 - cp's OEIS frontend

A357282 a(n) = number of subsets S of {1,2,...,n} having more than 1 element such that (difference between least two elements of S) = difference between greatest two elements of S.

n	a(n)
0	0
1	0
2	1
3	4
4	9
5	18
6	33
7	60
8	109
9	202
10	381
11	732
12	1425
13	2802
14	5545
15	11020
16	21957
17	43818
18	87525
19	174924
20	349705
21	699250
22	1398321
23	2796444
24	5592669
25	11185098
26	22369933
27	44739580
28	89478849
29	178957362
30	357914361
31	715828332
32	1431656245
33	2863312042
34	5726623605

[0, 0, 1, 4, 9, 18, 33, 60, 109, 202, 381, 732, 1425, 2802, 5545, 11020, 21957, 43818, 87525, 174924, 349705, 699250, 1398321, 2796444, 5592669, 11185098, 22369933, 44739580, 89478849, 178957362, 357914361, 715828332, 1431656245, 2863312042, 5726623605]

cp's OEIS Frontend

A357282 a(n) = number of subsets S of {1,2,...,n} having more than 1 element such that (difference between least two elements of S) = difference between greatest two elements of S.

Table of values

List of values