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.

A352864 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/2)} binomial(n-k,k) * a(n-2*k-1).

Table of values

n a(n)
0 1
1 1
2 1
3 3
4 6
5 13
6 34
7 84
8 230
9 653
10 1893
11 5794
12 18080
13 58345
14 193761
15 657959
16 2295398
17 8177305
18 29775086
19 110676222
20 419169483
21 1617868052
22 6353518921
23 25376986471
24 103017630200
25 424704411564
26 1777458163195
27 7546547411488
28 32490058003914
29 141774055915497
30 626739661952337

List of values

[1, 1, 1, 3, 6, 13, 34, 84, 230, 653, 1893, 5794, 18080, 58345, 193761, 657959, 2295398, 8177305, 29775086, 110676222, 419169483, 1617868052, 6353518921, 25376986471, 103017630200, 424704411564, 1777458163195, 7546547411488, 32490058003914, 141774055915497, 626739661952337]

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

Content is available under The OEIS End-User License Agreement.