A027917 - cp's OEIS frontend

A027917 a(n) = least k such that 1+2+...+k >= E{1,2,...,n}, where E is the 3rd elementary symmetric function.

n	a(n)
3	3
4	10
5	21
6	38
7	63
8	95
9	137
10	191
11	256
12	334
13	427
14	535
15	661
16	805
17	968
18	1151
19	1357
20	1585
21	1838
22	2117
23	2422
24	2755
25	3117
26	3510
27	3934
28	4392
29	4883
30	5409
31	5973
32	6574
33	7213
34	7894
35	8615
36	9379
37	10187
38	11041
39	11940
40	12887
41	13883
42	14929
43	16026
44	17176
45	18379
46	19637
47	20952
48	22323
49	23754
50	25244
51	26795
52	28408

[3, 10, 21, 38, 63, 95, 137, 191, 256, 334, 427, 535, 661, 805, 968, 1151, 1357, 1585, 1838, 2117, 2422, 2755, 3117, 3510, 3934, 4392, 4883, 5409, 5973, 6574, 7213, 7894, 8615, 9379, 10187, 11041, 11940, 12887, 13883, 14929, 16026, 17176, 18379, 19637, 20952, 22323, 23754, 25244, 26795, 28408]

cp's OEIS Frontend

A027917 a(n) = least k such that 1+2+...+k >= E{1,2,...,n}, where E is the 3rd elementary symmetric function.

Table of values

List of values