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.

A238686 Number of compositions c of n such that no three points (i,c_i), (j,c_j), (k,c_k) are collinear, where c_i denotes the i-th part.

Table of values

n a(n)
0 1
1 1
2 2
3 3
4 7
5 11
6 19
7 30
8 53
9 87
10 148
11 219
12 365
13 555
14 884
15 1379
16 2098
17 3152
18 4865
19 7051
20 10884
21 15681
22 23637
23 34062
24 50336
25 72425
26 105738
27 149781
28 217625
29 308859
30 440889
31 623823
32 885116
33 1241075
34 1744784
35 2433371
36 3401728
37 4719635
38 6548306
39 9035003
40 12472106

List of values

[1, 1, 2, 3, 7, 11, 19, 30, 53, 87, 148, 219, 365, 555, 884, 1379, 2098, 3152, 4865, 7051, 10884, 15681, 23637, 34062, 50336, 72425, 105738, 149781, 217625, 308859, 440889, 623823, 885116, 1241075, 1744784, 2433371, 3401728, 4719635, 6548306, 9035003, 12472106]

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

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