A375977 - cp's OEIS frontend

A375977 Number of subsets of {1,2,...,n} such that no two elements differ by 2 or 5.

n	a(n)
0	1
1	2
2	4
3	6
4	9
5	15
6	21
7	29
8	45
9	69
10	100
11	152
12	236
13	349
14	517
15	789
16	1185
17	1757
18	2653
19	4014
20	5992
21	8986
22	13573
23	20363
24	30485
25	45901
26	69041
27	103481
28	155468
29	233908
30	351104
31	527033
32	792405
33	1190493
34	1787129
35	2685209
36	4035261
37	6059758
38	9101828
39	13676670
40	20544125

[1, 2, 4, 6, 9, 15, 21, 29, 45, 69, 100, 152, 236, 349, 517, 789, 1185, 1757, 2653, 4014, 5992, 8986, 13573, 20363, 30485, 45901, 69041, 103481, 155468, 233908, 351104, 527033, 792405, 1190493, 1787129, 2685209, 4035261, 6059758, 9101828, 13676670, 20544125]

cp's OEIS Frontend

A375977 Number of subsets of {1,2,...,n} such that no two elements differ by 2 or 5.

Table of values

List of values