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.

A377105 E.g.f. A(x) satisfies [x^k] A(x)^(n*(n+1)/2+1) = 0 for k = n*(n-1)/2+2 through k = n*(n+1)/2+1 for n >= 1, with a(0) = a(1) = 1.

Table of values

n a(n)
0 1
1 1
2 -1
3 3
4 -15
5 120
6 -1530
7 27630
8 -609570
9 15061950
10 -401747850
11 11409145650
12 -343436893650
13 10953453262050
14 -370722834699750
15 13349217937623750
16 -512802860608788750
17 21056741300679288750
18 -924609697617056519250
19 43346843603808212081250
20 -2162059111418145178443750

List of values

[1, 1, -1, 3, -15, 120, -1530, 27630, -609570, 15061950, -401747850, 11409145650, -343436893650, 10953453262050, -370722834699750, 13349217937623750, -512802860608788750, 21056741300679288750, -924609697617056519250, 43346843603808212081250, -2162059111418145178443750]