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.

A123915 Number of binary words whose (unique) decreasing Lyndon decomposition is into Lyndon words each with an even number of 1's; EULER transform of A051841.

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 3
5 6
6 11
7 21
8 39
9 75
10 143
11 275
12 528
13 1020
14 1971
15 3821
16 7414
17 14419
18 28072
19 54739
20 106847
21 208815
22 408470
23 799806
24 1567333
25 3073916
26 6032971
27 11848693
28 23285202
29 45787650
30 90085410
31 177331748
32 349243800
33 688129474
34 1356433342
35 2674877358
36 5276869233

List of values

[1, 1, 1, 2, 3, 6, 11, 21, 39, 75, 143, 275, 528, 1020, 1971, 3821, 7414, 14419, 28072, 54739, 106847, 208815, 408470, 799806, 1567333, 3073916, 6032971, 11848693, 23285202, 45787650, 90085410, 177331748, 349243800, 688129474, 1356433342, 2674877358, 5276869233]

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

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