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.

A356421 Positive integers k such that k + p is a power of 2, where p is the least prime greater than k.

Table of values

n a(n)
1 3
2 15
3 61
4 255
5 2043
6 4093
7 32765
8 65535
9 262141
10 8388599
11 33554397
12 134217699
13 268435453
14 1073741821
15 17179869159
16 137438953463
17 274877906937
18 1099511627761
19 8796093022179
20 17592186044409
21 70368744177649
22 140737488355323
23 281474976710635
24 562949953421243

List of values

[3, 15, 61, 255, 2043, 4093, 32765, 65535, 262141, 8388599, 33554397, 134217699, 268435453, 1073741821, 17179869159, 137438953463, 274877906937, 1099511627761, 8796093022179, 17592186044409, 70368744177649, 140737488355323, 281474976710635, 562949953421243]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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