Irregular triangle read by rows: T(n,k), 2 <= n , 3 <= k <= largest k such that A067175(k) <= n , is the smallest n-digit number m such that omega(m) = A001221(m) = k, and its largest prime factor equals the sum of its remaining prime factors. or -1 if no such number exists.

A383677

Irregular triangle read by rows: T(n,k), 2 <= n , 3 <= k <= largest k such that A067175(k) <= n , is the smallest n-digit number m such that omega(m) = A001221(m) = k, and its largest prime factor equals the sum of its remaining prime factors. or -1 if no such number exists.

Terms

    a(0) =30a(1) =120a(2) =-1a(3) =1080a(4) =3135a(5) =3570a(6) =10336a(7) =10695a(8) =10626a(9) =-1a(10) =100672a(11) =102695a(12) =103730a(13) =844305a(14) =-1a(15) =1003520a(16) =1005039a(17) =1003450a(18) =1218945a(19) =1231230a(20) =-1a(21) =10017286a(22) =10000295a(23) =10003390a(24) =10064145a(25) =10314150a(26) =-1a(27) =100216924a(28) =100019275a(29) =100017216

External references