A359304 Oblong numbers which are products of five distinct primes.

4290, 4830, 6006, 11130, 12210, 13110, 16770, 23870, 27390, 33306, 34410, 34782, 37830, 44310, 49062, 56406, 60762, 64770, 66822, 70490, 71022, 74802, 82082, 84390, 95790, 101442, 103362, 104006, 109230, 119370, 125670, 127806, 133590, 137270, 148610, 151710, 158802

Offset: 1

Author

Massimo Kofler, Dec 25 2022

Keywords

• nonn

Examples

			4290 = 65*66 = 2*3*5*11*13.
4830 = 69*70 = 2*3*5*7*23.
6006 = 77*78 = 2*3*7*11*13.
11130 = 105*106 = 2*3*5*7*53.
		

Crossrefs

Intersection of A002378 and A046387.

Programs

Mathematica

Select[(#*(# + 1)) & /@ Range[400], FactorInteger[#][[;; , 2]] == {1, 1, 1, 1, 1} &] (* Amiram Eldar, Dec 25 2022 *)

PARI

select(x->((omega(x)==5) && (bigomega(x)==5)), vector(500, k, k*(k+1))) \\ Michel Marcus, Dec 25 2022