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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.

A278770 Second series of Hankel determinants based on squares of Catalan numbers.

Table of values

n a(n)
0 1
1 4
2 159
3 81296
4 585396881
5 61994262028020
6 98925461617709743975
7 2414583243140269424293854400
8 910504281815476426073145299359052745
9 5341354769384557074743892800174971438265757284
10 489946515248844365403775650233194419858267427195735348151
11 705379807799940807283682167156246485805791300481296966713394135535056

List of values

[1, 4, 159, 81296, 585396881, 61994262028020, 98925461617709743975, 2414583243140269424293854400, 910504281815476426073145299359052745, 5341354769384557074743892800174971438265757284, 489946515248844365403775650233194419858267427195735348151, 705379807799940807283682167156246485805791300481296966713394135535056]

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

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