A263996 - cp's OEIS frontend

A263996 Smallest possible cardinality of the union of the set of pairwise sums and the set of pairwise products from a set of n positive integers.

n	a(n)
1	1
2	4
3	7
4	11
5	15
6	20
7	26
8	30
9	36
10	44
11	49
12	57
13	64
14	71
15	80
16	86
17	96
18	104
19	112
20	121
21	131
22	141
23	150
24	160
25	169
26	179
27	190
28	200
29	212
30	222
31	235
32	248
33	260
34	272
35	283
36	296
37	307
38	320
39	335
40	348
41	360
42	371

[1, 4, 7, 11, 15, 20, 26, 30, 36, 44, 49, 57, 64, 71, 80, 86, 96, 104, 112, 121, 131, 141, 150, 160, 169, 179, 190, 200, 212, 222, 235, 248, 260, 272, 283, 296, 307, 320, 335, 348, 360, 371]

cp's OEIS Frontend

A263996 Smallest possible cardinality of the union of the set of pairwise sums and the set of pairwise products from a set of n positive integers.

Table of values

List of values

n	a(n)
1	1
2	4
3	7
4	11
5	15
6	20
7	26
8	30
9	36
10	44
11	49
12	57
13	64
14	71
15	80
16	86
17	96
18	104
19	112
20	121
21	131
22	141
23	150
24	160
25	169
26	179
27	190
28	200
29	212
30	222
31	235
32	248
33	260
34	272
35	283
36	296
37	307
38	320
39	335
40	348
41	360
42	371

n	a(n)
1	1
2	4
3	7
4	11
5	15
6	20
7	26
8	30
9	36
10	44
11	49
12	57
13	64
14	71
15	80
16	86
17	96
18	104
19	112
20	121
21	131
22	141
23	150
24	160
25	169
26	179
27	190
28	200
29	212
30	222
31	235
32	248
33	260
34	272
35	283
36	296
37	307
38	320
39	335
40	348
41	360
42	371

n	a(n)
1	1
2	4
3	7
4	11
5	15
6	20
7	26
8	30
9	36
10	44
11	49
12	57
13	64
14	71
15	80
16	86
17	96
18	104
19	112
20	121
21	131
22	141
23	150
24	160
25	169
26	179
27	190
28	200
29	212
30	222
31	235
32	248
33	260
34	272
35	283
36	296
37	307
38	320
39	335
40	348
41	360
42	371