A357575 - cp's OEIS frontend

A357575 Half area of the convex hull of {(x,y) | x,y integers and x^2 + y^2 <= n^2}.

n	a(n)
0	0
1	1
2	4
3	12
4	21
5	37
6	52
7	69
8	93
9	120
10	152
11	181
12	212
13	258
14	297
15	345
16	388
17	444
18	495
19	552
20	616
21	673
22	749
23	814
24	881
25	965
26	1046
27	1132
28	1211
29	1301
30	1396
31	1483
32	1589
33	1686
34	1800
35	1907
36	2006
37	2128
38	2235
39	2371
40	2490
41	2607
42	2741
43	2872
44	3020
45	3155
46	3293
47	3442
48	3581
49	3739

[0, 1, 4, 12, 21, 37, 52, 69, 93, 120, 152, 181, 212, 258, 297, 345, 388, 444, 495, 552, 616, 673, 749, 814, 881, 965, 1046, 1132, 1211, 1301, 1396, 1483, 1589, 1686, 1800, 1907, 2006, 2128, 2235, 2371, 2490, 2607, 2741, 2872, 3020, 3155, 3293, 3442, 3581, 3739]

cp's OEIS Frontend

A357575 Half area of the convex hull of {(x,y) | x,y integers and x^2 + y^2 <= n^2}.

Table of values

List of values