A256390 - cp's OEIS frontend

A256390 a(n) = number of triples (a,b,c) of natural numbers a,b,c <= n with gcd(a,b)=gcd(b,c)=gcd(c,a)=1.

n	a(n)
1	1
2	4
3	13
4	22
5	55
6	64
7	133
8	172
9	247
10	280
11	469
12	508
13	781
14	868
15	997
16	1144
17	1621
18	1714
19	2323
20	2488
21	2785
22	3010
23	3907
24	4078
25	4837
26	5176
27	5833
28	6178
29	7627
30	7798
31	9463
32	10102
33	10927
34	11530
35	12631
36	13006
37	15379
38	16150
39	17311
40	17926
41	20863
42	21256

[1, 4, 13, 22, 55, 64, 133, 172, 247, 280, 469, 508, 781, 868, 997, 1144, 1621, 1714, 2323, 2488, 2785, 3010, 3907, 4078, 4837, 5176, 5833, 6178, 7627, 7798, 9463, 10102, 10927, 11530, 12631, 13006, 15379, 16150, 17311, 17926, 20863, 21256]

cp's OEIS Frontend

A256390 a(n) = number of triples (a,b,c) of natural numbers a,b,c <= n with gcd(a,b)=gcd(b,c)=gcd(c,a)=1.

Table of values

List of values