A000153 - cp's OEIS frontend

A000153 a(n) = na(n-1) + (n-2)a(n-2), with a(0) = 0, a(1) = 1.

n	a(n)
0	0
1	1
2	2
3	7
4	32
5	181
6	1214
7	9403
8	82508
9	808393
10	8743994
11	103459471
12	1328953592
13	18414450877
14	273749755382
15	4345634192131
16	73362643649444
17	1312349454922513
18	24796092486996338
19	493435697986613143
20	10315043624498196944

[0, 1, 2, 7, 32, 181, 1214, 9403, 82508, 808393, 8743994, 103459471, 1328953592, 18414450877, 273749755382, 4345634192131, 73362643649444, 1312349454922513, 24796092486996338, 493435697986613143, 10315043624498196944]

cp's OEIS Frontend

A000153 a(n) = na(n-1) + (n-2)a(n-2), with a(0) = 0, a(1) = 1.

Table of values

List of values

cp's OEIS Frontend

A000153 a(n) = n*a(n-1) + (n-2)*a(n-2), with a(0) = 0, a(1) = 1.

Table of values

List of values

A000153 a(n) = na(n-1) + (n-2)a(n-2), with a(0) = 0, a(1) = 1.