A278814 - cp's OEIS frontend

A278814 a(n) = ceiling(sqrt(3n+1)).

n	a(n)
0	1
1	2
2	3
3	4
4	4
5	4
6	5
7	5
8	5
9	6
10	6
11	6
12	7
13	7
14	7
15	7
16	7
17	8
18	8
19	8
20	8
21	8
22	9
23	9
24	9
25	9
26	9
27	10
28	10
29	10
30	10
31	10
32	10
33	10
34	11
35	11
36	11
37	11
38	11
39	11
40	11
41	12
42	12
43	12
44	12
45	12
46	12
47	12
48	13
49	13
50	13
51	13
52	13
53	13
54	13
55	13
56	13
57	14
58	14
59	14
60	14
61	14
62	14
63	14
64	14
65	14
66	15
67	15
68	15
69	15
70	15
71	15
72	15
73	15
74	15
75	16
76	16
77	16
78	16
79	16
80	16
81	16
82	16
83	16
84	16
85	16
86	17
87	17
88	17
89	17
90	17
91	17
92	17
93	17
94	17
95	17
96	17
97	18
98	18
99	18
100	18

[1, 2, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18]

cp's OEIS Frontend

A278814 a(n) = ceiling(sqrt(3n+1)).

Table of values

List of values

n	a(n)
0	1
1	2
2	3
3	4
4	4
5	4
6	5
7	5
8	5
9	6
10	6
11	6
12	7
13	7
14	7
15	7
16	7
17	8
18	8
19	8
20	8
21	8
22	9
23	9
24	9
25	9
26	9
27	10
28	10
29	10
30	10
31	10
32	10
33	10
34	11
35	11
36	11
37	11
38	11
39	11
40	11
41	12
42	12
43	12
44	12
45	12
46	12
47	12
48	13
49	13
50	13
51	13
52	13
53	13
54	13
55	13
56	13
57	14
58	14
59	14
60	14
61	14
62	14
63	14
64	14
65	14
66	15
67	15
68	15
69	15
70	15
71	15
72	15
73	15
74	15
75	16
76	16
77	16
78	16
79	16
80	16
81	16
82	16
83	16
84	16
85	16
86	17
87	17
88	17
89	17
90	17
91	17
92	17
93	17
94	17
95	17
96	17
97	18
98	18
99	18
100	18

n	a(n)
0	1
1	2
2	3
3	4
4	4
5	4
6	5
7	5
8	5
9	6
10	6
11	6
12	7
13	7
14	7
15	7
16	7
17	8
18	8
19	8
20	8
21	8
22	9
23	9
24	9
25	9
26	9
27	10
28	10
29	10
30	10
31	10
32	10
33	10
34	11
35	11
36	11
37	11
38	11
39	11
40	11
41	12
42	12
43	12
44	12
45	12
46	12
47	12
48	13
49	13
50	13
51	13
52	13
53	13
54	13
55	13
56	13
57	14
58	14
59	14
60	14
61	14
62	14
63	14
64	14
65	14
66	15
67	15
68	15
69	15
70	15
71	15
72	15
73	15
74	15
75	16
76	16
77	16
78	16
79	16
80	16
81	16
82	16
83	16
84	16
85	16
86	17
87	17
88	17
89	17
90	17
91	17
92	17
93	17
94	17
95	17
96	17
97	18
98	18
99	18
100	18

n	a(n)
0	1
1	2
2	3
3	4
4	4
5	4
6	5
7	5
8	5
9	6
10	6
11	6
12	7
13	7
14	7
15	7
16	7
17	8
18	8
19	8
20	8
21	8
22	9
23	9
24	9
25	9
26	9
27	10
28	10
29	10
30	10
31	10
32	10
33	10
34	11
35	11
36	11
37	11
38	11
39	11
40	11
41	12
42	12
43	12
44	12
45	12
46	12
47	12
48	13
49	13
50	13
51	13
52	13
53	13
54	13
55	13
56	13
57	14
58	14
59	14
60	14
61	14
62	14
63	14
64	14
65	14
66	15
67	15
68	15
69	15
70	15
71	15
72	15
73	15
74	15
75	16
76	16
77	16
78	16
79	16
80	16
81	16
82	16
83	16
84	16
85	16
86	17
87	17
88	17
89	17
90	17
91	17
92	17
93	17
94	17
95	17
96	17
97	18
98	18
99	18
100	18