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.

A291561 Diagonal in triangle A291560: a(n) = -A291560(n+1, n) for n>=1.

Table of values

n a(n)
1 1
2 10
3 315
4 18900
5 1819125
6 255405150
7 49165491375
8 12417798393000
9 3981456609755625
10 1579311121869731250
11 759174856282779811875
12 434800144961955710437500
13 292511797523155704196828125
14 228384211143079261353677343750
15 204811697921525723306815646484375
16 209071781238293458351597411931250000
17 241020562808770177455950891441994140625
18 311597054671244174125111099536008660156250

List of values

[1, 10, 315, 18900, 1819125, 255405150, 49165491375, 12417798393000, 3981456609755625, 1579311121869731250, 759174856282779811875, 434800144961955710437500, 292511797523155704196828125, 228384211143079261353677343750, 204811697921525723306815646484375, 209071781238293458351597411931250000, 241020562808770177455950891441994140625, 311597054671244174125111099536008660156250]

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

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