A233005 - cp's OEIS frontend

A233005 a(n) = floor(Pt(n)/n!), where Pt(n) is product of first n positive triangular numbers (A000217).

n	a(n)
1	1
2	1
3	3
4	7
5	22
6	78
7	315
8	1417
9	7087
10	38981
11	233887
12	1520268
13	10641881
14	79814109
15	638512875
16	5427359437
17	48846234937
18	464039231906
19	4640392319062
20	48724119350156
21	535965312851718
22	6163601097794765
23	73963213173537187
24	924540164669214843
25	12019022140699792968

[1, 1, 3, 7, 22, 78, 315, 1417, 7087, 38981, 233887, 1520268, 10641881, 79814109, 638512875, 5427359437, 48846234937, 464039231906, 4640392319062, 48724119350156, 535965312851718, 6163601097794765, 73963213173537187, 924540164669214843, 12019022140699792968]

cp's OEIS Frontend

A233005 a(n) = floor(Pt(n)/n!), where Pt(n) is product of first n positive triangular numbers (A000217).

Table of values

List of values