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.

A321203 Irregular triangle T giving the coefficients of x^n = x^{2*e2 + 3*e3} of (1 + x^2 + x^3)^n, with the pair of nonnegative numbers [e2, e3] listed in row n of A321201, for n >= 2.

Table of values

n a(n)
2 2
3 3
4 6
5 20
6 15
7 20
8 105
9 168
10 70
11 84
12 504
13 1260
14 252
15 1320
16 2310
17 495
18 7920
19 924
20 12870
21 10296
22 10010
23 45045
24 3432
25 3003
26 100100
27 45045
28 120120
29 240240
30 12870
31 74256
32 680680
33 194480
34 18564
35 1113840
36 1225224
37 48620
38 1058148
39 4232592
40 831402
41 542640
42 8817900
43 6046560
44 184756

List of values

[2, 3, 6, 20, 15, 20, 105, 168, 70, 84, 504, 1260, 252, 1320, 2310, 495, 7920, 924, 12870, 10296, 10010, 45045, 3432, 3003, 100100, 45045, 120120, 240240, 12870, 74256, 680680, 194480, 18564, 1113840, 1225224, 48620, 1058148, 4232592, 831402, 542640, 8817900, 6046560, 184756]