A343565 - cp's OEIS frontend

A343565 a(n) = |{(x_1, x_2, ... , x_n) : 1 <= x_1 <= x_2 <= ... <= x_n <= n, gcd(x_1, x_2, ... , x_n, n) = 1}|.

n	a(n)
1	1
2	2
3	9
4	30
5	125
6	428
7	1715
8	6270
9	24255
10	91367
11	352715
12	1345448
13	5200299
14	20019526
15	77554749
16	300295038
17	1166803109
18	4535971916
19	17672631899
20	68913247655
21	269128640958
22	1051984969598
23	4116715363799
24	16123381989000
25	63205303195125
26	247956558998878
27	973469689288236

[1, 2, 9, 30, 125, 428, 1715, 6270, 24255, 91367, 352715, 1345448, 5200299, 20019526, 77554749, 300295038, 1166803109, 4535971916, 17672631899, 68913247655, 269128640958, 1051984969598, 4116715363799, 16123381989000, 63205303195125, 247956558998878, 973469689288236]

cp's OEIS Frontend

A343565 a(n) = |{(x_1, x_2, ... , x_n) : 1 <= x_1 <= x_2 <= ... <= x_n <= n, gcd(x_1, x_2, ... , x_n, n) = 1}|.

Table of values

List of values