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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.

A129879 Sequence a_{a_n} arising in enumeration of arrays of directed blocks (see Quaintance reference for precise definition), where a_n is A129878.

Table of values

n a(n)
1 1
2 0
3 3
4 9
5 42
6 182
7 821
8 3754

List of values

[1, 0, 3, 9, 42, 182, 821, 3754]

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

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