A268469 Integers k such that k and k+1 are products of 8 primes.

50624, 78975, 156735, 176175, 194480, 245024, 257984, 309375, 390624, 439424, 540224, 543104, 620864, 631071, 693279, 705375, 809919, 854144, 916352, 998000, 1087424, 1143800, 1147040, 1159839, 1165184, 1188999, 1266111, 1274048, 1276479, 1347920, 1389375

Offset: 1

Author

Zak Seidov, Feb 08 2016

Keywords

• nonn

Comments

Primes counted with multiplicity. - Harvey P. Dale, Jun 12 2025

Examples

			50624 = 2^6*7*113; 50625 = 3^4*5^4.
		

Links

• Zak Seidov, Table of n, a(n) for n = 1..1000

Crossrefs

Intersection of A046310 and A045920.

Programs

Mathematica

SequencePosition[Table[If[PrimeOmega[n]==8,1,0],{n,139*10^4}],{1,1}][[;;,1]] (* Harvey P. Dale, Jun 12 2025 *)

PARI

is(n)=bigomega(n)==8 && bigomega(n+1)==8 \\ Charles R Greathouse IV, Feb 08 2016