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.

A068194 Numbers k for which the only representation of k*(k+1)/2 as a sum of 2 or more consecutive positive integers is 1+2+...+k.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 7
6 16
7 31
8 127
9 256
10 8191
11 65536
12 131071
13 524287
14 2147483647
15 2305843009213693951
16 618970019642690137449562111
17 162259276829213363391578010288127
18 170141183460469231731687303715884105727

List of values

[1, 2, 3, 4, 7, 16, 31, 127, 256, 8191, 65536, 131071, 524287, 2147483647, 2305843009213693951, 618970019642690137449562111, 162259276829213363391578010288127, 170141183460469231731687303715884105727]

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

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