A357291 - cp's OEIS frontend

A357291 a(n) = number of subsets S of {1,2,...,n} having more than 2 elements such that (sum of least two elements of S) < difference between greatest two elements of S.

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	1
7	3
8	8
9	19
10	42
11	89
12	185
13	378
14	766
15	1544
16	3102
17	6220
18	12459
19	24939
20	49902
21	99831
22	199692
23	399417
24	798871
25	1597782
26	3195608
27	6391264
28	12782580
29	25565216
30	51130493
31	102261051
32	204522172
33	409044419
34	818088918
35	1636177921
36	3272355933

[0, 0, 0, 0, 0, 0, 1, 3, 8, 19, 42, 89, 185, 378, 766, 1544, 3102, 6220, 12459, 24939, 49902, 99831, 199692, 399417, 798871, 1597782, 3195608, 6391264, 12782580, 25565216, 51130493, 102261051, 204522172, 409044419, 818088918, 1636177921, 3272355933]

cp's OEIS Frontend

A357291 a(n) = number of subsets S of {1,2,...,n} having more than 2 elements such that (sum of least two elements of S) < difference between greatest two elements of S.

Table of values

List of values