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.

A357784 a(n) = Sum_{k=0..floor((n-2)/3)} 2^k * Stirling2(n,3*k+2).

Table of values

n a(n)
0 0
1 0
2 1
3 3
4 7
5 17
6 61
7 343
8 2231
9 14301
10 88561
11 542011
12 3397483
13 22638993
14 164336085
15 1299899087
16 10991061663
17 97070035205
18 881323166809
19 8173386231395
20 77489746906355
21 754631383660729
22 7590899551399869
23 79174328607339767
24 856889470005396071

List of values

[0, 0, 1, 3, 7, 17, 61, 343, 2231, 14301, 88561, 542011, 3397483, 22638993, 164336085, 1299899087, 10991061663, 97070035205, 881323166809, 8173386231395, 77489746906355, 754631383660729, 7590899551399869, 79174328607339767, 856889470005396071]