A163305 - cp's OEIS frontend

A163305 Numerators of fractions in the approximation of the square root of 5 satisfying: a(n)= (a(n-1)+ c)/(a(n-1)+1); with c=5 and a(1)=0. Also product of the powers of two and five times the Fibonacci numbers.

n	a(n)
1	0
2	5
3	10
4	40
5	120
6	400
7	1280
8	4160
9	13440
10	43520
11	140800
12	455680
13	1474560
14	4771840
15	15441920
16	49971200
17	161710080
18	523304960
19	1693450240
20	5480120320
21	17734041600
22	57388564480
23	185713295360
24	600980848640
25	1944814878720

[0, 5, 10, 40, 120, 400, 1280, 4160, 13440, 43520, 140800, 455680, 1474560, 4771840, 15441920, 49971200, 161710080, 523304960, 1693450240, 5480120320, 17734041600, 57388564480, 185713295360, 600980848640, 1944814878720]

cp's OEIS Frontend

A163305 Numerators of fractions in the approximation of the square root of 5 satisfying: a(n)= (a(n-1)+ c)/(a(n-1)+1); with c=5 and a(1)=0. Also product of the powers of two and five times the Fibonacci numbers.

Table of values

List of values