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.

A135758 Catalan numbers at triangular positions: a(n) = A000108(n(n+1)/2).

Table of values

n a(n)
0 1
1 1
2 5
3 132
4 16796
5 9694845
6 24466267020
7 263747951750360
8 11959798385860453492
9 2257117854077248073253720
10 1759414616608818870992479875972
11 5632681584560312734993915705849145100

List of values

[1, 1, 5, 132, 16796, 9694845, 24466267020, 263747951750360, 11959798385860453492, 2257117854077248073253720, 1759414616608818870992479875972, 5632681584560312734993915705849145100]

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

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