A001046 - cp's OEIS frontend

A001046 a(n) = n(n-1)a(n-1)/2 + a(n-2), a(0) = a(1) = 1.

n	a(n)
0	1
1	1
2	2
3	7
4	44
5	447
6	6749
7	142176
8	3987677
9	143698548
10	6470422337
11	356016927083
12	23503587609815
13	1833635850492653
14	166884365982441238
15	17524692064006822643
16	2103129932046801158398
17	286043195450428964364771
18	43766712033847678348968361

[1, 1, 2, 7, 44, 447, 6749, 142176, 3987677, 143698548, 6470422337, 356016927083, 23503587609815, 1833635850492653, 166884365982441238, 17524692064006822643, 2103129932046801158398, 286043195450428964364771, 43766712033847678348968361]

cp's OEIS Frontend

A001046 a(n) = n(n-1)a(n-1)/2 + a(n-2), a(0) = a(1) = 1.

Table of values

List of values

cp's OEIS Frontend

A001046 a(n) = n*(n-1)*a(n-1)/2 + a(n-2), a(0) = a(1) = 1.

Table of values

List of values

A001046 a(n) = n(n-1)a(n-1)/2 + a(n-2), a(0) = a(1) = 1.