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.

A371780 a(n) = Sum_{k=0..floor(n/3)} binomial(5*n+2,n-3*k).

Table of values

n a(n)
0 1
1 7
2 66
3 681
4 7337
5 81081
6 911153
7 10361554
8 118881714
9 1373402934
10 15954079557
11 186165866937
12 2180501226751
13 25620628577083
14 301858589475117
15 3564841627421691
16 42186363329210473
17 500142626996777355
18 5939062937833796486
19 70626949319708756435

List of values

[1, 7, 66, 681, 7337, 81081, 911153, 10361554, 118881714, 1373402934, 15954079557, 186165866937, 2180501226751, 25620628577083, 301858589475117, 3564841627421691, 42186363329210473, 500142626996777355, 5939062937833796486, 70626949319708756435]

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

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