A378502 - cp's OEIS frontend

A378502 a(n) is the number whose base-4 digits are 1 followed by the first n-1 terms of the periodic sequence with initial period 3,2,0.

n	a(n)
1	1
2	7
3	30
4	120
5	483
6	1934
7	7736
8	30947
9	123790
10	495160
11	1980643
12	7922574
13	31690296
14	126761187
15	507044750
16	2028179000
17	8112716003
18	32450864014
19	129803456056
20	519213824227
21	2076855296910
22	8307421187640
23	33229684750563
24	132918739002254
25	531674956009016

[1, 7, 30, 120, 483, 1934, 7736, 30947, 123790, 495160, 1980643, 7922574, 31690296, 126761187, 507044750, 2028179000, 8112716003, 32450864014, 129803456056, 519213824227, 2076855296910, 8307421187640, 33229684750563, 132918739002254, 531674956009016]

cp's OEIS Frontend

A378502 a(n) is the number whose base-4 digits are 1 followed by the first n-1 terms of the periodic sequence with initial period 3,2,0.

Table of values

List of values