A047905 - cp's OEIS frontend

A047905 a(n+1) = a(n) + n (if n is even), a(n+1) = a(n) * n (if n is odd).

n	a(n)
1	1
2	1
3	3
4	9
5	13
6	65
7	71
8	497
9	505
10	4545
11	4555
12	50105
13	50117
14	651521
15	651535
16	9773025
17	9773041
18	166141697
19	166141715
20	3156692585
21	3156692605
22	66290544705
23	66290544727
24	1524682528721
25	1524682528745
26	38117063218625
27	38117063218651

[1, 1, 3, 9, 13, 65, 71, 497, 505, 4545, 4555, 50105, 50117, 651521, 651535, 9773025, 9773041, 166141697, 166141715, 3156692585, 3156692605, 66290544705, 66290544727, 1524682528721, 1524682528745, 38117063218625, 38117063218651]

cp's OEIS Frontend

A047905 a(n+1) = a(n) + n (if n is even), a(n+1) = a(n) * n (if n is odd).

Table of values

List of values