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

1,1

Comments

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

Links

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

Example

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

Mathematica

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

Prog

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

Crossrefs

Intersection of A046310 and A045920.

Sequence in context: A253032 A251486 A376929 * A250442 A183824 A013877

Adjacent sequences: A268466 A268467 A268468 * A268470 A268471 A268472

Keyword

nonn

Author

Zak Seidov, Feb 08 2016

Status

approved