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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.

A073617 Consider Pascal's triangle A007318; a(n) = product of terms at +45 degrees slope with the horizontal.

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 3
5 12
6 30
7 240
8 1050
9 16800
10 132300
11 4233600
12 61122600
13 3911846400
14 104886381600
15 13425456844800
16 674943865596000
17 172785629592576000
18 16407885372638760000
19 8400837310791045120000
20 1515727634953623371280000
21 1552105098192510332190720000

List of values

[1, 1, 1, 2, 3, 12, 30, 240, 1050, 16800, 132300, 4233600, 61122600, 3911846400, 104886381600, 13425456844800, 674943865596000, 172785629592576000, 16407885372638760000, 8400837310791045120000, 1515727634953623371280000, 1552105098192510332190720000]

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

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