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.

A275046 Number of binary strings with n zeros and n ones avoiding the substrings 10101101 and 1110101.

Table of values

n a(n)
0 1
1 2
2 6
3 20
4 70
5 245
6 874
7 3164
8 11577
9 42694
10 158431
11 590873
12 2212797
13 8315535
14 31341163
15 118423810
16 448455754
17 1701534151
18 6467049185
19 24617030774
20 93834205107
21 358116770601
22 1368283768753
23 5233261657558
24 20034371696497
25 76763164565117
26 294357181436313
27 1129575035419485

List of values

[1, 2, 6, 20, 70, 245, 874, 3164, 11577, 42694, 158431, 590873, 2212797, 8315535, 31341163, 118423810, 448455754, 1701534151, 6467049185, 24617030774, 93834205107, 358116770601, 1368283768753, 5233261657558, 20034371696497, 76763164565117, 294357181436313, 1129575035419485]

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

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