A291487 - cp's OEIS frontend

A291487 a(n) is the smallest k such that psi(k) = n!, or 0 if no such k exists (psi(k) = A001615(k)).

n	a(n)
0	1
1	1
2	0
3	4
4	12
5	75
6	300
7	1950
8	13650
9	122850
10	1160250
11	13340250
12	140390250
13	1825073250
14	25318743450
15	370489869750
16	5503458610650
17	93558796381050
18	1643961707838450
19	30815473745606550
20	596477734382780250
21	12526032422038385250
22	272871020017346000250
23	6276033460398958005750

[1, 1, 0, 4, 12, 75, 300, 1950, 13650, 122850, 1160250, 13340250, 140390250, 1825073250, 25318743450, 370489869750, 5503458610650, 93558796381050, 1643961707838450, 30815473745606550, 596477734382780250, 12526032422038385250, 272871020017346000250, 6276033460398958005750]

cp's OEIS Frontend

A291487 a(n) is the smallest k such that psi(k) = n!, or 0 if no such k exists (psi(k) = A001615(k)).

Table of values

List of values