A000919 - cp's OEIS frontend

A000919 a(n) = 4^n - C(4,3)3^n + C(4,2)2^n - C(4,1).

n	a(n)
1	0
2	0
3	0
4	24
5	240
6	1560
7	8400
8	40824
9	186480
10	818520
11	3498000
12	14676024
13	60780720
14	249401880
15	1016542800
16	4123173624
17	16664094960
18	67171367640
19	270232006800
20	1085570781624
21	4356217681200
22	17466686971800
23	69992221794000
24	280345359228024
25	1122510953731440

[0, 0, 0, 24, 240, 1560, 8400, 40824, 186480, 818520, 3498000, 14676024, 60780720, 249401880, 1016542800, 4123173624, 16664094960, 67171367640, 270232006800, 1085570781624, 4356217681200, 17466686971800, 69992221794000, 280345359228024, 1122510953731440]

cp's OEIS Frontend

A000919 a(n) = 4^n - C(4,3)3^n + C(4,2)2^n - C(4,1).

Table of values

List of values

cp's OEIS Frontend

A000919 a(n) = 4^n - C(4,3)*3^n + C(4,2)*2^n - C(4,1).

Table of values

List of values

A000919 a(n) = 4^n - C(4,3)3^n + C(4,2)2^n - C(4,1).