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.

A147540 Numbers whose binary representation is the concatenation of 2n-1 digits 1, n digits 0 and 2n-1 digits 1.

Table of values

n a(n)
1 5
2 231
3 7967
4 260223
5 8372735
6 268306431
7 8588894207
8 274869551103
9 8796026044415
10 281474440364031
11 9007194961870847
12 288230341800361983
13 9223371762010423295
14 295147902980463788031
15 9444732948147641253887

List of values

[5, 231, 7967, 260223, 8372735, 268306431, 8588894207, 274869551103, 8796026044415, 281474440364031, 9007194961870847, 288230341800361983, 9223371762010423295, 295147902980463788031, 9444732948147641253887]

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

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