A122972 - cp's OEIS frontend

A122972 a(1) = 1, a(2) = 2; for n>2, a(n+1) = a(n)(n-1) + a(n-1)n.

n	a(n)
1	1
2	2
3	4
4	14
5	58
6	302
7	1858
8	13262
9	107698
10	980942
11	9905458
12	109844942
13	1327159858
14	17353902542
15	244180971058
16	3678842132942
17	59089527531058
18	1007972756756942
19	18199148360427058
20	346736152866068942

[1, 2, 4, 14, 58, 302, 1858, 13262, 107698, 980942, 9905458, 109844942, 1327159858, 17353902542, 244180971058, 3678842132942, 59089527531058, 1007972756756942, 18199148360427058, 346736152866068942]

cp's OEIS Frontend

A122972 a(1) = 1, a(2) = 2; for n>2, a(n+1) = a(n)(n-1) + a(n-1)n.

Table of values

List of values

cp's OEIS Frontend

A122972 a(1) = 1, a(2) = 2; for n>2, a(n+1) = a(n)*(n-1) + a(n-1)*n.

Table of values

List of values

A122972 a(1) = 1, a(2) = 2; for n>2, a(n+1) = a(n)(n-1) + a(n-1)n.