A080915 - cp's OEIS frontend

A080915 Number of electrons in outermost electron shell (valence electrons) in chemical element number n.

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

[1, 2, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 2, 2, 1, 1, 2, 1, 1, 10, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2]

cp's OEIS Frontend

A080915 Number of electrons in outermost electron shell (valence electrons) in chemical element number n.

Table of values

List of values

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

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

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