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.

A332754 a(n) = Sum_{k=1..n-1} ((-1)^(k+n+1)*binomial(k,floor(k/2))).

Table of values

n a(n)
1 0
2 1
3 1
4 2
5 4
6 6
7 14
8 21
9 49
10 77
11 175
12 287
13 637
14 1079
15 2353
16 4082
17 8788
18 15522
19 33098
20 59280
21 125476
22 227240
23 478192
24 873886
25 1830270
26 3370030
27 7030570
28 13027730
29 27088870
30 50469890
31 104647630
32 195892565
33 405187825
34 761615285
35 1571990935
36 2965576715

List of values

[0, 1, 1, 2, 4, 6, 14, 21, 49, 77, 175, 287, 637, 1079, 2353, 4082, 8788, 15522, 33098, 59280, 125476, 227240, 478192, 873886, 1830270, 3370030, 7030570, 13027730, 27088870, 50469890, 104647630, 195892565, 405187825, 761615285, 1571990935, 2965576715]

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

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