A228921 - cp's OEIS frontend

A228921 Number of solutions to Sum_{i=1..n} x_i^2 == 0 (mod 8) with x_i in 0..7.

n	a(n)
1	2
2	8
3	32
4	128
5	3072
6	32768
7	294912
8	2392064
9	17825792
10	134217728
11	1040187392
12	8313110528
13	67645734912
14	549755813888
15	4432406249472
16	35461397479424
17	282574488338432
18	2251799813685248
19	17979214137393152
20	143833163343331328
21	1151795604700004352
22	9223372036854775808

[2, 8, 32, 128, 3072, 32768, 294912, 2392064, 17825792, 134217728, 1040187392, 8313110528, 67645734912, 549755813888, 4432406249472, 35461397479424, 282574488338432, 2251799813685248, 17979214137393152, 143833163343331328, 1151795604700004352, 9223372036854775808]

cp's OEIS Frontend

A228921 Number of solutions to Sum_{i=1..n} x_i^2 == 0 (mod 8) with x_i in 0..7.

Table of values

List of values