A004159 - cp's OEIS frontend

A004159 Sum of digits of n^2.

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

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

cp's OEIS Frontend

A004159 Sum of digits of n^2.

Table of values

List of values

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

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

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