A112428 Carmichael numbers equal to the product of 5 primes.

825265, 1050985, 9890881, 10877581, 12945745, 13992265, 16778881, 18162001, 27336673, 28787185, 31146661, 36121345, 37167361, 40280065, 41298985, 41341321, 41471521, 47006785, 67371265, 67994641, 69331969, 74165065

Offset: 1

Author

Shyam Sunder Gupta, Dec 11 2005

Keywords

• easy
• nonn

Comments

A subsequence is given by (6n+1)*(12n+1)*(18n+1)*(36n+1)*(72n+1) with n in A206349. - M. F. Hasler, Apr 14 2015

Examples

			a(1)=825265=5*7*17*19*73
		

Links

• R. J. Mathar, Table of n, a(n) for n = 1..14938

Crossrefs

Cf. A002997, A014614, A206349.

Cf. A087788, A141711, A074379, A112429 - A112432, A006931.

Programs

PARI

is_A112428(n)=bigomega(n)==5&&is_A002997(n) \\ M. F. Hasler, Apr 14 2015

Formula

A112428 = A002997 intersect A014614. - M. F. Hasler, Apr 14 2015

Extensions

Crossrefs added by M. F. Hasler, Apr 14 2015