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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.

A215542 a(n) = binomial(6*n,n)*(4*n+1)/(5*n+1).

Table of values

n a(n)
0 1
1 5
2 54
3 663
4 8602
5 115101
6 1570800
7 21732542
8 303719922
9 4277470470
10 60610884906
11 863102246760
12 12340998865104
13 177064708142315
14 2547927647834040
15 36757054103054076
16 531436857842656610
17 7698470087956704210
18 111712846834848074340
19 1623556455926349703605

List of values

[1, 5, 54, 663, 8602, 115101, 1570800, 21732542, 303719922, 4277470470, 60610884906, 863102246760, 12340998865104, 177064708142315, 2547927647834040, 36757054103054076, 531436857842656610, 7698470087956704210, 111712846834848074340, 1623556455926349703605]

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

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