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.

A001699 Number of binary trees of height n; or products (ways to insert parentheses) of height n when multiplication is non-commutative and non-associative.

Table of values

n a(n)
0 1
1 1
2 3
3 21
4 651
5 457653
6 210065930571
7 44127887745696109598901
8 1947270476915296449559659317606103024276803403
9 3791862310265926082868235028027893277370233150300118107846437701158064808916492244872560821

List of values

[1, 1, 3, 21, 651, 457653, 210065930571, 44127887745696109598901, 1947270476915296449559659317606103024276803403, 3791862310265926082868235028027893277370233150300118107846437701158064808916492244872560821]

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

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