A069960 - cp's OEIS frontend

A069960 Define C(n) by the recursion C(0) = 3i where i^2 = -1, C(n+1) = 1/(1 + C(n)), then a(n) = 3(-1)^n/Im(C(n)) where Im(z) denotes the imaginary part of the complex number z.

n	a(n)
0	1
1	10
2	13
3	45
4	106
5	289
6	745
7	1962
8	5125
9	13429
10	35146
11	92025
12	240913
13	630730
14	1651261
15	4323069
16	11317930
17	29630737
18	77574265
19	203092074
20	531701941
21	1392013765
22	3644339338
23	9541004265
24	24978673441
25	65395016074
26	171206374765
27	448224108237
28	1173465949930

[1, 10, 13, 45, 106, 289, 745, 1962, 5125, 13429, 35146, 92025, 240913, 630730, 1651261, 4323069, 11317930, 29630737, 77574265, 203092074, 531701941, 1392013765, 3644339338, 9541004265, 24978673441, 65395016074, 171206374765, 448224108237, 1173465949930]

cp's OEIS Frontend

A069960 Define C(n) by the recursion C(0) = 3i where i^2 = -1, C(n+1) = 1/(1 + C(n)), then a(n) = 3(-1)^n/Im(C(n)) where Im(z) denotes the imaginary part of the complex number z.

Table of values

List of values

cp's OEIS Frontend

A069960 Define C(n) by the recursion C(0) = 3*i where i^2 = -1, C(n+1) = 1/(1 + C(n)), then a(n) = 3*(-1)^n/Im(C(n)) where Im(z) denotes the imaginary part of the complex number z.

Table of values

List of values

A069960 Define C(n) by the recursion C(0) = 3i where i^2 = -1, C(n+1) = 1/(1 + C(n)), then a(n) = 3(-1)^n/Im(C(n)) where Im(z) denotes the imaginary part of the complex number z.