A095237 - cp's OEIS frontend

A095237 a(1)=1; then for n even, a(n)=(sum of previous terms times n) plus 1, for n odd, a(n)=(sum of previous terms times n) minus 1.

n	a(n)
1	1
2	3
3	11
4	61
5	379
6	2731
7	22301
8	203897
9	2064455
10	22938391
11	277554529
12	3633441109
13	51170962283
14	771500662115
15	12399117783989
16	211611610180081
17	3822234708877711
18	72847296804492847
19	1460993008134550985

[1, 3, 11, 61, 379, 2731, 22301, 203897, 2064455, 22938391, 277554529, 3633441109, 51170962283, 771500662115, 12399117783989, 211611610180081, 3822234708877711, 72847296804492847, 1460993008134550985]

cp's OEIS Frontend

A095237 a(1)=1; then for n even, a(n)=(sum of previous terms times n) plus 1, for n odd, a(n)=(sum of previous terms times n) minus 1.

Table of values

List of values