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.

A268138 a(n) = (Sum_{k=0..n-1} A001850(k)*A001003(k+1))/n.

Table of values

n a(n)
1 1
2 5
3 51
4 747
5 13245
6 264329
7 5721415
8 131425079
9 3159389817
10 78729848397
11 2019910325499
12 53087981674275
13 1423867359013749
14 38855956977763857
15 1076297858301372687
16 30203970496501504239
17 857377825323716359665
18 24586286492003180067989
19 711463902659879056604995
20 20756358426519694831851227

List of values

[1, 5, 51, 747, 13245, 264329, 5721415, 131425079, 3159389817, 78729848397, 2019910325499, 53087981674275, 1423867359013749, 38855956977763857, 1076297858301372687, 30203970496501504239, 857377825323716359665, 24586286492003180067989, 711463902659879056604995, 20756358426519694831851227]

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

Content is available under The OEIS End-User License Agreement.