A343519 - cp's OEIS frontend

A343519 a(n) = Sum_{1 <= x_1 <= x_2 <= x_3 <= x_4 <= x_5 <= n} gcd(x_1, x_2, x_3 , x_4, x_5, n).

n	a(n)
1	1
2	7
3	23
4	64
5	130
6	287
7	468
8	864
9	1335
10	2156
11	3013
12	4790
13	6200
14	9072
15	11972
16	16440
17	20365
18	28209
19	33667
20	45014
21	54192
22	68853
23	80752
24	104964
25	119279
26	148778
27	172629
28	211252
29	237364
30	295288
31	324662
32	394368
33	442133
34	522403
35	578385
36	696624
37	749434
38	884443
39	975250
40	1136476

[1, 7, 23, 64, 130, 287, 468, 864, 1335, 2156, 3013, 4790, 6200, 9072, 11972, 16440, 20365, 28209, 33667, 45014, 54192, 68853, 80752, 104964, 119279, 148778, 172629, 211252, 237364, 295288, 324662, 394368, 442133, 522403, 578385, 696624, 749434, 884443, 975250, 1136476]

cp's OEIS Frontend

A343519 a(n) = Sum_{1 <= x_1 <= x_2 <= x_3 <= x_4 <= x_5 <= n} gcd(x_1, x_2, x_3 , x_4, x_5, n).

Table of values

List of values