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.

A099972 Write 1/sqrt(2) as a binary fraction; read this from left to right and whenever a 1 appears, note the integer formed by reading leftwards from that 1.

Table of values

n a(n)
0 1
1 5
2 13
3 45
4 173
5 8365
6 73901
7 204973
8 467117
9 991405
10 5185709
11 13574317
12 80683181
13 214900909
14 1288642733
15 3436126381
16 7731093677
17 16321028269
18 33500897453
19 67860635821
20 136580112557
21 686335926445
22 1785847554221

List of values

[1, 5, 13, 45, 173, 8365, 73901, 204973, 467117, 991405, 5185709, 13574317, 80683181, 214900909, 1288642733, 3436126381, 7731093677, 16321028269, 33500897453, 67860635821, 136580112557, 686335926445, 1785847554221]

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

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