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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.

A336245 Triangle read by rows: row n gives coefficients T(n,k), in descending powers of m, of a polynomial P_n(m) (of degree n - 1) in an expression for the number of bimonotone subdivisions B(m,n) of a grid with two rows.

Table of values

n a(n)
1 1
2 1
3 0
4 1
5 3
6 -6
7 1
8 9
9 -4
10 -60
11 1
12 18
13 47
14 -258
15 -600
16 1
17 30
18 215
19 -270
20 -4896
21 -6720
22 1
23 45
24 595
25 1455
26 -16796
27 -84660
28 -85680
29 1
30 63
31 1309
32 8925
33 -22526
34 -470148
35 -1508424
36 -1239840
37 1
38 84
39 2506
40 30240
41 66409
42 -1500324
43 -11721396
44 -28649040
45 -20200320

List of values

[1, 1, 0, 1, 3, -6, 1, 9, -4, -60, 1, 18, 47, -258, -600, 1, 30, 215, -270, -4896, -6720, 1, 45, 595, 1455, -16796, -84660, -85680, 1, 63, 1309, 8925, -22526, -470148, -1508424, -1239840, 1, 84, 2506, 30240, 66409, -1500324, -11721396, -28649040, -20200320]