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.

A124515 Numbers k for which 2*k-1, 4*k-1, 8*k-1, 16*k-1, 32*k-1, 64*k-1, 128*k-1 and 256*k-1 are primes.

Table of values

n a(n)
1 9549960
2 26277285
3 42932385
4 85864770
5 99239790
6 113183070
7 152596290
8 172159515
9 198479580
10 237059175
11 287482065
12 305192580
13 342533490
14 382203030
15 542591115
16 563002110
17 597825570
18 686106720
19 742227135
20 786875025
21 1135145760

List of values

[9549960, 26277285, 42932385, 85864770, 99239790, 113183070, 152596290, 172159515, 198479580, 237059175, 287482065, 305192580, 342533490, 382203030, 542591115, 563002110, 597825570, 686106720, 742227135, 786875025, 1135145760]

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

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