A373103 - cp's OEIS frontend

A373103 a(n) = Sum_{1 <= x_1, x_2, x_3, x_4, x_5 <= n} ( n/gcd(x_1, x_2, x_3, x_4, x_5, n) )^4.

n	a(n)
1	1
2	497
3	19603
4	254449
5	1952501
6	9742691
7	40351207
8	130277873
9	385845769
10	970392997
11	2357933051
12	4987963747
13	10604470813
14	20054549879
15	38274877103
16	66702270961
17	118587792977
18	191765347193
19	322687567459
20	496811926949
21	791004710821
22	1171892726347
23	1801152381623

[1, 497, 19603, 254449, 1952501, 9742691, 40351207, 130277873, 385845769, 970392997, 2357933051, 4987963747, 10604470813, 20054549879, 38274877103, 66702270961, 118587792977, 191765347193, 322687567459, 496811926949, 791004710821, 1171892726347, 1801152381623]

cp's OEIS Frontend

A373103 a(n) = Sum_{1 <= x_1, x_2, x_3, x_4, x_5 <= n} ( n/gcd(x_1, x_2, x_3, x_4, x_5, n) )^4.

Table of values

List of values