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.

A245738 Number of compositions of n into parts 1 and 2 with both parts present.

Table of values

n a(n)
3 2
4 3
5 7
6 11
7 20
8 32
9 54
10 87
11 143
12 231
13 376
14 608
15 986
16 1595
17 2583
18 4179
19 6764
20 10944
21 17710
22 28655
23 46367
24 75023
25 121392
26 196416
27 317810
28 514227
29 832039
30 1346267
31 2178308
32 3524576
33 5702886
34 9227463
35 14930351
36 24157815
37 39088168
38 63245984
39 102334154
40 165580139
41 267914295
42 433494435
43 701408732
44 1134903168
45 1836311902

List of values

[2, 3, 7, 11, 20, 32, 54, 87, 143, 231, 376, 608, 986, 1595, 2583, 4179, 6764, 10944, 17710, 28655, 46367, 75023, 121392, 196416, 317810, 514227, 832039, 1346267, 2178308, 3524576, 5702886, 9227463, 14930351, 24157815, 39088168, 63245984, 102334154, 165580139, 267914295, 433494435, 701408732, 1134903168, 1836311902]

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

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