A268228 - cp's OEIS frontend

A268228 a(n) = sum of digits of (2n + 1)^2.

n	a(n)
0	1
1	9
2	7
3	13
4	9
5	4
6	16
7	9
8	19
9	10
10	9
11	16
12	13
13	18
14	13
15	16
16	18
17	10
18	19
19	9
20	16
21	22
22	9
23	13
24	7
25	9
26	19
27	10
28	18
29	16
30	13
31	27
32	13
33	25
34	18
35	10
36	19
37	18
38	25
39	13
40	18
41	31
42	16
43	27
44	19
45	19
46	27
47	16
48	22
49	18
50	4
51	16
52	9
53	19
54	19
55	9
56	25
57	13
58	27
59	13
60	16
61	18
62	19
63	19
64	18
65	16
66	31
67	18
68	31
69	16
70	27
71	19
72	10
73	18
74	7
75	13
76	18

[1, 9, 7, 13, 9, 4, 16, 9, 19, 10, 9, 16, 13, 18, 13, 16, 18, 10, 19, 9, 16, 22, 9, 13, 7, 9, 19, 10, 18, 16, 13, 27, 13, 25, 18, 10, 19, 18, 25, 13, 18, 31, 16, 27, 19, 19, 27, 16, 22, 18, 4, 16, 9, 19, 19, 9, 25, 13, 27, 13, 16, 18, 19, 19, 18, 16, 31, 18, 31, 16, 27, 19, 10, 18, 7, 13, 18]

cp's OEIS Frontend

A268228 a(n) = sum of digits of (2n + 1)^2.

Table of values

List of values

n	a(n)
0	1
1	9
2	7
3	13
4	9
5	4
6	16
7	9
8	19
9	10
10	9
11	16
12	13
13	18
14	13
15	16
16	18
17	10
18	19
19	9
20	16
21	22
22	9
23	13
24	7
25	9
26	19
27	10
28	18
29	16
30	13
31	27
32	13
33	25
34	18
35	10
36	19
37	18
38	25
39	13
40	18
41	31
42	16
43	27
44	19
45	19
46	27
47	16
48	22
49	18
50	4
51	16
52	9
53	19
54	19
55	9
56	25
57	13
58	27
59	13
60	16
61	18
62	19
63	19
64	18
65	16
66	31
67	18
68	31
69	16
70	27
71	19
72	10
73	18
74	7
75	13
76	18

n	a(n)
0	1
1	9
2	7
3	13
4	9
5	4
6	16
7	9
8	19
9	10
10	9
11	16
12	13
13	18
14	13
15	16
16	18
17	10
18	19
19	9
20	16
21	22
22	9
23	13
24	7
25	9
26	19
27	10
28	18
29	16
30	13
31	27
32	13
33	25
34	18
35	10
36	19
37	18
38	25
39	13
40	18
41	31
42	16
43	27
44	19
45	19
46	27
47	16
48	22
49	18
50	4
51	16
52	9
53	19
54	19
55	9
56	25
57	13
58	27
59	13
60	16
61	18
62	19
63	19
64	18
65	16
66	31
67	18
68	31
69	16
70	27
71	19
72	10
73	18
74	7
75	13
76	18

n	a(n)
0	1
1	9
2	7
3	13
4	9
5	4
6	16
7	9
8	19
9	10
10	9
11	16
12	13
13	18
14	13
15	16
16	18
17	10
18	19
19	9
20	16
21	22
22	9
23	13
24	7
25	9
26	19
27	10
28	18
29	16
30	13
31	27
32	13
33	25
34	18
35	10
36	19
37	18
38	25
39	13
40	18
41	31
42	16
43	27
44	19
45	19
46	27
47	16
48	22
49	18
50	4
51	16
52	9
53	19
54	19
55	9
56	25
57	13
58	27
59	13
60	16
61	18
62	19
63	19
64	18
65	16
66	31
67	18
68	31
69	16
70	27
71	19
72	10
73	18
74	7
75	13
76	18