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.

A128897 a(n) = ((2n)^(2n-1)+1)/(2n+1).

Table of values

n a(n)
1 1
2 13
3 1111
4 233017
5 90909091
6 57154490053
7 52914318216943
8 67818912035696881
9 115047976828352449051
10 249660952380952380952381
11 674758650917429955329341351
12 2222892961417140207415135788073

List of values

[1, 13, 1111, 233017, 90909091, 57154490053, 52914318216943, 67818912035696881, 115047976828352449051, 249660952380952380952381, 674758650917429955329341351, 2222892961417140207415135788073]

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

Content is available under The OEIS End-User License Agreement.