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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.

A277298 Central terms of triangle A277295 in odd-indexed rows; a(n) = A277295(2*n-1,n-1).

Table of values

n a(n)
1 1
2 2
3 76
4 5404
5 535410
6 66031704
7 9583782716
8 1584902128648
9 292586323812088
10 59462699504146980
11 13171171610678351360
12 3155802303880338506184
13 813045290972961285049576
14 224143228528852050484555760
15 65850557807967931843625040120
16 20543425063284611418233827507248
17 6784261706348459523065200262509390

List of values

[1, 2, 76, 5404, 535410, 66031704, 9583782716, 1584902128648, 292586323812088, 59462699504146980, 13171171610678351360, 3155802303880338506184, 813045290972961285049576, 224143228528852050484555760, 65850557807967931843625040120, 20543425063284611418233827507248, 6784261706348459523065200262509390]

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

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