A351859 - cp's OEIS frontend

A351859 a(n) = [x^n] (1 + x + x^2 + x^3)^(4n)/(1 + x + x^2)^(3n).

n	a(n)
0	1
1	1
2	3
3	19
4	67
5	251
6	1137
7	4803
8	20035
9	87013
10	377753
11	1634469
12	7134385
13	31261114
14	137121113
15	603206144
16	2660097603
17	11749336328
18	51981371895
19	230336544210
20	1021976441817
21	4539784391763
22	20188837618799
23	89871081815631
24	400427435522737
25	1785639575031501

[1, 1, 3, 19, 67, 251, 1137, 4803, 20035, 87013, 377753, 1634469, 7134385, 31261114, 137121113, 603206144, 2660097603, 11749336328, 51981371895, 230336544210, 1021976441817, 4539784391763, 20188837618799, 89871081815631, 400427435522737, 1785639575031501]

cp's OEIS Frontend

A351859 a(n) = [x^n] (1 + x + x^2 + x^3)^(4n)/(1 + x + x^2)^(3n).

Table of values

List of values

cp's OEIS Frontend

A351859 a(n) = [x^n] (1 + x + x^2 + x^3)^(4*n)/(1 + x + x^2)^(3*n).

Table of values

List of values

A351859 a(n) = [x^n] (1 + x + x^2 + x^3)^(4n)/(1 + x + x^2)^(3n).