Numbers k such that P(k)^2 | k and P(k+1)^4 | (k+1), where P(k) = A006530(k) is the largest prime dividing k.

A354565

Numbers k such that P(k)^2 | k and P(k+1)^4 | (k+1), where P(k) = A006530(k) is the largest prime dividing k.

Terms

    a(0) =242a(1) =2400a(2) =57121a(3) =499999a(4) =1012499a(5) =2825760a(6) =2829123a(7) =11859210a(8) =18279039a(9) =21093749a(10) =37218852a(11) =38740085a(12) =70799772a(13) =96393374a(14) =413428949a(15) =642837222a(16) =656356767a(17) =675975026a(18) =1065352364a(19) =1333564323a(20) =1418528255a(21) =2654744949a(22) =5547008142a(23) =8576868299a(24) =9515377949a(25) =10022519999

External references