A047904 - cp's OEIS frontend

A047904 a(n+1) = a(n) + n (if n is odd), a(n+1) = a(n) * n (if n is even).

n	a(n)
1	1
2	2
3	4
4	7
5	28
6	33
7	198
8	205
9	1640
10	1649
11	16490
12	16501
13	198012
14	198025
15	2772350
16	2772365
17	44357840
18	44357857
19	798441426
20	798441445
21	15968828900
22	15968828921
23	351314236262
24	351314236285
25	8431541670840
26	8431541670865
27	219220083442490

[1, 2, 4, 7, 28, 33, 198, 205, 1640, 1649, 16490, 16501, 198012, 198025, 2772350, 2772365, 44357840, 44357857, 798441426, 798441445, 15968828900, 15968828921, 351314236262, 351314236285, 8431541670840, 8431541670865, 219220083442490]

cp's OEIS Frontend

A047904 a(n+1) = a(n) + n (if n is odd), a(n+1) = a(n) * n (if n is even).

Table of values

List of values