A004253 - cp's OEIS frontend

A004253 a(n) = 5*a(n-1) - a(n-2), with a(1)=1, a(2)=4.

n	a(n)
1	1
2	4
3	19
4	91
5	436
6	2089
7	10009
8	47956
9	229771
10	1100899
11	5274724
12	25272721
13	121088881
14	580171684
15	2779769539
16	13318676011
17	63813610516
18	305749376569
19	1464933272329
20	7018916985076
21	33629651653051
22	161129341280179
23	772017054747844
24	3698955932459041
25	17722762607547361

[1, 4, 19, 91, 436, 2089, 10009, 47956, 229771, 1100899, 5274724, 25272721, 121088881, 580171684, 2779769539, 13318676011, 63813610516, 305749376569, 1464933272329, 7018916985076, 33629651653051, 161129341280179, 772017054747844, 3698955932459041, 17722762607547361]

cp's OEIS Frontend

A004253 a(n) = 5*a(n-1) - a(n-2), with a(1)=1, a(2)=4.

Table of values

List of values