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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.

A352902 a(0) = 1; a(n) = Sum_{k=0..floor(n/4)} binomial(n+1,4*k+1) * a(k).

Table of values

n a(n)
0 1
1 2
2 3
3 4
4 7
5 18
6 49
7 120
8 264
9 544
10 1100
11 2256
12 4736
13 10080
14 21456
15 45312
16 94850
17 197412
18 410134
19 852968
20 1778382
21 3719364
22 7806338
23 16451280
24 34835184
25 74164800
26 158854536
27 342478432
28 743432288
29 1625079936
30 3576582592
31 7922065408
32 17648409603

List of values

[1, 2, 3, 4, 7, 18, 49, 120, 264, 544, 1100, 2256, 4736, 10080, 21456, 45312, 94850, 197412, 410134, 852968, 1778382, 3719364, 7806338, 16451280, 34835184, 74164800, 158854536, 342478432, 743432288, 1625079936, 3576582592, 7922065408, 17648409603]

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

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