A137928 - cp's OEIS frontend

A137928 The even principal diagonal of a 2n X 2n square spiral.

n	a(n)
1	2
2	4
3	10
4	16
5	26
6	36
7	50
8	64
9	82
10	100
11	122
12	144
13	170
14	196
15	226
16	256
17	290
18	324
19	362
20	400
21	442
22	484
23	530
24	576
25	626
26	676
27	730
28	784
29	842
30	900
31	962
32	1024
33	1090
34	1156
35	1226
36	1296
37	1370
38	1444
39	1522
40	1600
41	1682
42	1764
43	1850
44	1936
45	2026
46	2116
47	2210
48	2304
49	2402
50	2500
51	2602
52	2704
53	2810

[2, 4, 10, 16, 26, 36, 50, 64, 82, 100, 122, 144, 170, 196, 226, 256, 290, 324, 362, 400, 442, 484, 530, 576, 626, 676, 730, 784, 842, 900, 962, 1024, 1090, 1156, 1226, 1296, 1370, 1444, 1522, 1600, 1682, 1764, 1850, 1936, 2026, 2116, 2210, 2304, 2402, 2500, 2602, 2704, 2810]

cp's OEIS Frontend

A137928 The even principal diagonal of a 2n X 2n square spiral.

Table of values

List of values