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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.

A246659 a(n) = binomial(n-h,h)*hypergeometric([h-n/2,h-(n-1)/2],[1],4), h = floor(n/4).

Table of values

n a(n)
0 1
1 1
2 3
3 7
4 9
5 28
6 95
7 306
8 285
9 1071
10 3948
11 14148
12 11844
13 47160
14 182655
15 690580
16 547965
17 2244385
18 8961953
19 35016345
20 26885859
21 112052304
22 456606332
23 1824478488
24 1369818996
25 5777515212
26 23884958520
27 97002706248
28 71654875560
29 304865648208
30 1273989485439

List of values

[1, 1, 3, 7, 9, 28, 95, 306, 285, 1071, 3948, 14148, 11844, 47160, 182655, 690580, 547965, 2244385, 8961953, 35016345, 26885859, 112052304, 456606332, 1824478488, 1369818996, 5777515212, 23884958520, 97002706248, 71654875560, 304865648208, 1273989485439]

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

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