A082574 - cp's OEIS frontend

A082574 a(1)=1, a(n) = ceiling(r(3)a(n-1)) where r(3) = (1/2)(3 + sqrt(13)) is the positive root of X^2 = 3*X + 1.

n	a(n)
1	1
2	4
3	14
4	47
5	156
6	516
7	1705
8	5632
9	18602
10	61439
11	202920
12	670200
13	2213521
14	7310764
15	24145814
16	79748207
17	263390436
18	869919516
19	2873148985
20	9489366472
21	31341248402
22	103513111679
23	341880583440
24	1129154862000
25	3729345169441
26	12317190370324

[1, 4, 14, 47, 156, 516, 1705, 5632, 18602, 61439, 202920, 670200, 2213521, 7310764, 24145814, 79748207, 263390436, 869919516, 2873148985, 9489366472, 31341248402, 103513111679, 341880583440, 1129154862000, 3729345169441, 12317190370324]

cp's OEIS Frontend

A082574 a(1)=1, a(n) = ceiling(r(3)a(n-1)) where r(3) = (1/2)(3 + sqrt(13)) is the positive root of X^2 = 3*X + 1.

Table of values

List of values

cp's OEIS Frontend

A082574 a(1)=1, a(n) = ceiling(r(3)*a(n-1)) where r(3) = (1/2)*(3 + sqrt(13)) is the positive root of X^2 = 3*X + 1.

Table of values

List of values

A082574 a(1)=1, a(n) = ceiling(r(3)a(n-1)) where r(3) = (1/2)(3 + sqrt(13)) is the positive root of X^2 = 3*X + 1.