A268227 - cp's OEIS frontend

A268227 a(n) = sum of digits of (2n)^2.

n	a(n)
0	0
1	4
2	7
3	9
4	10
5	1
6	9
7	16
8	13
9	9
10	4
11	16
12	18
13	19
14	19
15	9
16	7
17	13
18	18
19	13
20	7
21	18
22	19
23	10
24	9
25	7
26	13
27	18
28	13
29	16
30	9
31	19
32	19
33	18
34	16
35	13
36	18
37	22
38	25
39	18
40	10
41	19
42	18
43	25
44	22
45	9
46	22
47	25
48	18
49	19
50	1
51	9
52	16
53	13
54	18
55	4
56	16
57	27
58	19
59	19
60	9
61	25
62	22
63	27
64	22
65	16
66	18
67	28
68	28
69	18
70	16
71	13
72	18
73	13
74	16
75	9
76	10
77	19
78	18

[0, 4, 7, 9, 10, 1, 9, 16, 13, 9, 4, 16, 18, 19, 19, 9, 7, 13, 18, 13, 7, 18, 19, 10, 9, 7, 13, 18, 13, 16, 9, 19, 19, 18, 16, 13, 18, 22, 25, 18, 10, 19, 18, 25, 22, 9, 22, 25, 18, 19, 1, 9, 16, 13, 18, 4, 16, 27, 19, 19, 9, 25, 22, 27, 22, 16, 18, 28, 28, 18, 16, 13, 18, 13, 16, 9, 10, 19, 18]

cp's OEIS Frontend

A268227 a(n) = sum of digits of (2n)^2.

Table of values

List of values

n	a(n)
0	0
1	4
2	7
3	9
4	10
5	1
6	9
7	16
8	13
9	9
10	4
11	16
12	18
13	19
14	19
15	9
16	7
17	13
18	18
19	13
20	7
21	18
22	19
23	10
24	9
25	7
26	13
27	18
28	13
29	16
30	9
31	19
32	19
33	18
34	16
35	13
36	18
37	22
38	25
39	18
40	10
41	19
42	18
43	25
44	22
45	9
46	22
47	25
48	18
49	19
50	1
51	9
52	16
53	13
54	18
55	4
56	16
57	27
58	19
59	19
60	9
61	25
62	22
63	27
64	22
65	16
66	18
67	28
68	28
69	18
70	16
71	13
72	18
73	13
74	16
75	9
76	10
77	19
78	18

n	a(n)
0	0
1	4
2	7
3	9
4	10
5	1
6	9
7	16
8	13
9	9
10	4
11	16
12	18
13	19
14	19
15	9
16	7
17	13
18	18
19	13
20	7
21	18
22	19
23	10
24	9
25	7
26	13
27	18
28	13
29	16
30	9
31	19
32	19
33	18
34	16
35	13
36	18
37	22
38	25
39	18
40	10
41	19
42	18
43	25
44	22
45	9
46	22
47	25
48	18
49	19
50	1
51	9
52	16
53	13
54	18
55	4
56	16
57	27
58	19
59	19
60	9
61	25
62	22
63	27
64	22
65	16
66	18
67	28
68	28
69	18
70	16
71	13
72	18
73	13
74	16
75	9
76	10
77	19
78	18

n	a(n)
0	0
1	4
2	7
3	9
4	10
5	1
6	9
7	16
8	13
9	9
10	4
11	16
12	18
13	19
14	19
15	9
16	7
17	13
18	18
19	13
20	7
21	18
22	19
23	10
24	9
25	7
26	13
27	18
28	13
29	16
30	9
31	19
32	19
33	18
34	16
35	13
36	18
37	22
38	25
39	18
40	10
41	19
42	18
43	25
44	22
45	9
46	22
47	25
48	18
49	19
50	1
51	9
52	16
53	13
54	18
55	4
56	16
57	27
58	19
59	19
60	9
61	25
62	22
63	27
64	22
65	16
66	18
67	28
68	28
69	18
70	16
71	13
72	18
73	13
74	16
75	9
76	10
77	19
78	18