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.

A139289 (2^(2p - 1)/2)-1, where p is prime.

Table of values

n a(n)
1 3
2 15
3 255
4 4095
5 1048575
6 16777215
7 4294967295
8 68719476735
9 17592186044415
10 72057594037927935
11 1152921504606846975
12 4722366482869645213695
13 1208925819614629174706175
14 19342813113834066795298815
15 4951760157141521099596496895
16 20282409603651670423947251286015
17 83076749736557242056487941267521535

List of values

[3, 15, 255, 4095, 1048575, 16777215, 4294967295, 68719476735, 17592186044415, 72057594037927935, 1152921504606846975, 4722366482869645213695, 1208925819614629174706175, 19342813113834066795298815, 4951760157141521099596496895, 20282409603651670423947251286015, 83076749736557242056487941267521535]

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

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