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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.

A085881 Triangle T(n,k) read by rows: multiply row n of Pascal's triangle (A007318) by A001147(n).

Table of values

n a(n)
0 1
1 1
2 1
3 3
4 6
5 3
6 15
7 45
8 45
9 15
10 105
11 420
12 630
13 420
14 105
15 945
16 4725
17 9450
18 9450
19 4725
20 945
21 10395
22 62370
23 155925
24 207900
25 155925
26 62370
27 10395
28 135135
29 945945
30 2837835
31 4729725
32 4729725
33 2837835
34 945945
35 135135
36 2027025
37 16216200
38 56756700
39 113513400
40 141891750
41 113513400
42 56756700
43 16216200
44 2027025

List of values

[1, 1, 1, 3, 6, 3, 15, 45, 45, 15, 105, 420, 630, 420, 105, 945, 4725, 9450, 9450, 4725, 945, 10395, 62370, 155925, 207900, 155925, 62370, 10395, 135135, 945945, 2837835, 4729725, 4729725, 2837835, 945945, 135135, 2027025, 16216200, 56756700, 113513400, 141891750, 113513400, 56756700, 16216200, 2027025]

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

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