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.

A032092 Number of reversible strings with n-1 beads of 2 colors. 5 beads are black. String is not palindromic.

Table of values

n a(n)
7 3
8 9
9 28
10 60
11 126
12 226
13 396
14 636
15 1001
16 1491
17 2184
18 3080
19 4284
20 5796
21 7752
22 10152
23 13167
24 16797
25 21252
26 26532
27 32890
28 40326
29 49140
30 59332
31 71253
32 84903
33 100688
34 118608
35 139128
36 162248
37 188496
38 217872
39 250971
40 287793
41 329004
42 374604
43 425334
44 481194
45 543004

List of values

[3, 9, 28, 60, 126, 226, 396, 636, 1001, 1491, 2184, 3080, 4284, 5796, 7752, 10152, 13167, 16797, 21252, 26532, 32890, 40326, 49140, 59332, 71253, 84903, 100688, 118608, 139128, 162248, 188496, 217872, 250971, 287793, 329004, 374604, 425334, 481194, 543004]

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

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