A281581 - cp's OEIS frontend

A281581 a(n) = (152^(2n+2) + 152^(n+2) + 52^(n+3)3^(n+1) - 245^(n+1))/120.

n	a(n)
0	1
1	4
2	21
3	127
4	807
5	5179
6	33111
7	210067
8	1321887
9	8255899
10	51225351
11	316067107
12	1941032367
13	11873549419
14	72394874391
15	440204293747
16	2670669533247
17	16172309991739
18	97779619272231
19	590423692897987
20	3561340764760527
21	21462312506478859

[1, 4, 21, 127, 807, 5179, 33111, 210067, 1321887, 8255899, 51225351, 316067107, 1941032367, 11873549419, 72394874391, 440204293747, 2670669533247, 16172309991739, 97779619272231, 590423692897987, 3561340764760527, 21462312506478859]

cp's OEIS Frontend

A281581 a(n) = (152^(2n+2) + 152^(n+2) + 52^(n+3)3^(n+1) - 245^(n+1))/120.

Table of values

List of values

cp's OEIS Frontend

A281581 a(n) = (15*2^(2*n+2) + 15*2^(n+2) + 5*2^(n+3)*3^(n+1) - 24*5^(n+1))/120.

Table of values

List of values

A281581 a(n) = (152^(2n+2) + 152^(n+2) + 52^(n+3)3^(n+1) - 245^(n+1))/120.