A357283 - cp's OEIS frontend

A357283 a(n) = number of subsets S of {1,2,...,n} having more than 1 element such that (sum of least two elements of S) < max(S).

n	a(n)
0	0
1	0
2	0
3	0
4	2
5	8
6	26
7	68
8	166
9	376
10	826
11	1756
12	3678
13	7584
14	15522
15	31524
16	63782
17	128552
18	258602
19	519212
20	1041454
21	2086960
22	4180018
23	8368180
24	16748598
25	33513528
26	67051578
27	134135868
28	268320830
29	536707136
30	1073512514
31	2147156036
32	4294508614
33	8589279304

[0, 0, 0, 0, 2, 8, 26, 68, 166, 376, 826, 1756, 3678, 7584, 15522, 31524, 63782, 128552, 258602, 519212, 1041454, 2086960, 4180018, 8368180, 16748598, 33513528, 67051578, 134135868, 268320830, 536707136, 1073512514, 2147156036, 4294508614, 8589279304]

cp's OEIS Frontend

A357283 a(n) = number of subsets S of {1,2,...,n} having more than 1 element such that (sum of least two elements of S) < max(S).

Table of values

List of values