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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.

A200375 Product of Catalan and Jacobsthal numbers: a(n) = A000108(n)*A001045(n+1).

Table of values

n a(n)
0 1
1 1
2 6
3 25
4 154
5 882
6 5676
7 36465
8 244530
9 1657942
10 11471668
11 80242890
12 568080772
13 4056976900
14 29212908120
15 211783889025
16 1544811959970
17 11328491394990
18 83473572128100
19 617702666484750
20 4588654943721420
21 34206312386929020
22 255803818897858920
23 1918528298674328250
24 14427334095935095764

List of values

[1, 1, 6, 25, 154, 882, 5676, 36465, 244530, 1657942, 11471668, 80242890, 568080772, 4056976900, 29212908120, 211783889025, 1544811959970, 11328491394990, 83473572128100, 617702666484750, 4588654943721420, 34206312386929020, 255803818897858920, 1918528298674328250, 14427334095935095764]

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

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