A053479 - cp's OEIS frontend

A053479 Circle numbers (version 6): a(n) = number of points (i+j/2,jsqrt(3)/2), i,j integers (triangular grid) contained in a circle of diameter n, centered at (1/2, 1/(2sqrt(3))).

n	a(n)
0	0
1	0
2	3
3	6
4	12
5	21
6	30
7	42
8	54
9	69
10	90
11	102
12	129
13	150
14	174
15	198
16	225
17	258
18	288
19	327
20	354
21	396
22	435
23	471
24	522
25	558
26	609
27	654
28	702
29	759
30	807
31	864
32	924
33	981
34	1038
35	1104
36	1173
37	1230
38	1308
39	1368
40	1443
41	1512
42	1590
43	1671
44	1746
45	1830
46	1908
47	2001
48	2076
49	2166
50	2265

[0, 0, 3, 6, 12, 21, 30, 42, 54, 69, 90, 102, 129, 150, 174, 198, 225, 258, 288, 327, 354, 396, 435, 471, 522, 558, 609, 654, 702, 759, 807, 864, 924, 981, 1038, 1104, 1173, 1230, 1308, 1368, 1443, 1512, 1590, 1671, 1746, 1830, 1908, 2001, 2076, 2166, 2265]

cp's OEIS Frontend

A053479 Circle numbers (version 6): a(n) = number of points (i+j/2,jsqrt(3)/2), i,j integers (triangular grid) contained in a circle of diameter n, centered at (1/2, 1/(2sqrt(3))).

Table of values

List of values

cp's OEIS Frontend

A053479 Circle numbers (version 6): a(n) = number of points (i+j/2,j*sqrt(3)/2), i,j integers (triangular grid) contained in a circle of diameter n, centered at (1/2, 1/(2*sqrt(3))).

Table of values

List of values

A053479 Circle numbers (version 6): a(n) = number of points (i+j/2,jsqrt(3)/2), i,j integers (triangular grid) contained in a circle of diameter n, centered at (1/2, 1/(2sqrt(3))).