A232097 - cp's OEIS frontend

A232097 a(n) = least k such that 1+2+3+...+k (k-th triangular number) is a multiple of n!; a(n) = least k such that A232096(k) >= n.

n	a(n)
1	1
2	3
3	3
4	15
5	15
6	224
7	224
8	4095
9	76544
10	512000
11	9511424
12	20916224
13	410572799
14	672358400
15	2985984000
16	1004293914624
17	1004293914624
18	78942076928000
19	610877575397375
20	83179139563520000
21	490473044848410624
22	6878928869130239999
23	185974097225789210624
24	1708887984313466880000
25	68817755280574852890624

[1, 3, 3, 15, 15, 224, 224, 4095, 76544, 512000, 9511424, 20916224, 410572799, 672358400, 2985984000, 1004293914624, 1004293914624, 78942076928000, 610877575397375, 83179139563520000, 490473044848410624, 6878928869130239999, 185974097225789210624, 1708887984313466880000, 68817755280574852890624]

cp's OEIS Frontend

A232097 a(n) = least k such that 1+2+3+...+k (k-th triangular number) is a multiple of n!; a(n) = least k such that A232096(k) >= n.

Table of values

List of values