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.

A100138 a(n) = Sum_{k=0..floor(n/6)} C(n-3k,3k) * 2^(n-5k).

Table of values

n a(n)
0 1
1 2
2 4
3 8
4 16
5 32
6 66
7 144
8 336
9 832
10 2144
11 5632
12 14852
13 38968
14 101312
15 260736
16 664704
17 1681152
18 4226056
19 10578080
20 26407648
21 65838848
22 164095360
23 409129472
24 1020795408
25 2549137824
26 6371133120
27 15935185792
28 39878810624
29 99837958144

List of values

[1, 2, 4, 8, 16, 32, 66, 144, 336, 832, 2144, 5632, 14852, 38968, 101312, 260736, 664704, 1681152, 4226056, 10578080, 26407648, 65838848, 164095360, 409129472, 1020795408, 2549137824, 6371133120, 15935185792, 39878810624, 99837958144]

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

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