A232683 - cp's OEIS frontend

A232683 G.f. A(x) satisfies: the sum of the coefficients of x^k, k=0..n, in A(x)^n equals (3*n)!/n!^3, which is de Bruijn's sequence S(3,n) (A006480), for n>=0.

n	a(n)
0	1
1	5
2	27
3	191
4	1732
5	18690
6	226300
7	2964284
8	41082774
9	593967362
10	8873943769
11	136095567381
12	2132329828638
13	34008171994644
14	550591656446061
15	9029248417359913
16	149726007326186129
17	2507013639225903129
18	42337830100883644650
19	720436676774318943294
20	12342627498327879008169

[1, 5, 27, 191, 1732, 18690, 226300, 2964284, 41082774, 593967362, 8873943769, 136095567381, 2132329828638, 34008171994644, 550591656446061, 9029248417359913, 149726007326186129, 2507013639225903129, 42337830100883644650, 720436676774318943294, 12342627498327879008169]

cp's OEIS Frontend

A232683 G.f. A(x) satisfies: the sum of the coefficients of x^k, k=0..n, in A(x)^n equals (3*n)!/n!^3, which is de Bruijn's sequence S(3,n) (A006480), for n>=0.

Table of values

List of values