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.

A373638 a(n) = Sum_{k=0..floor(n/2)} binomial(3*n-5*k,k).

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 9
5 21
6 43
7 92
8 196
9 414
10 882
11 1869
12 3970
13 8427
14 17887
15 37975
16 80608
17 171121
18 363254
19 771119
20 1636944
21 3474913
22 7376591
23 15659094
24 33241289
25 70564951
26 149795989
27 317988473
28 675029164
29 1432958824
30 3041899638
31 6457375642
32 13707783053
33 29099021980

List of values

[1, 1, 2, 5, 9, 21, 43, 92, 196, 414, 882, 1869, 3970, 8427, 17887, 37975, 80608, 171121, 363254, 771119, 1636944, 3474913, 7376591, 15659094, 33241289, 70564951, 149795989, 317988473, 675029164, 1432958824, 3041899638, 6457375642, 13707783053, 29099021980]

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

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