cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A371402 a(n) = gcd(2*n, 4^n)^(2*n + 1) mod (2^(2*n + 1) - 1)^2.

Table of values

n a(n)
0 0
1 8
2 63
3 128
4 1534
5 2048
6 16383
7 32768
8 524285
9 524288
10 4194303
11 8388608
12 100663294
13 134217728
14 1073741823
15 2147483648
16 42949672956
17 34359738368
18 274877906943
19 549755813888
20 6597069766654
21 8796093022208
22 70368744177663
23 140737488355328
24 2251799813685245

List of values

[0, 8, 63, 128, 1534, 2048, 16383, 32768, 524285, 524288, 4194303, 8388608, 100663294, 134217728, 1073741823, 2147483648, 42949672956, 34359738368, 274877906943, 549755813888, 6597069766654, 8796093022208, 70368744177663, 140737488355328, 2251799813685245]