Triangle read by rows: T(n,k) is the number of numbers <= primorial(n) with k prime factors, counted without multiplicity.

A292922

Triangle read by rows: T(n,k) is the number of numbers <= primorial(n) with k prime factors, counted without multiplicity.

Terms

    a(0) =1a(1) =4a(2) =1a(3) =16a(4) =12a(5) =1a(6) =60a(7) =116a(8) =32a(9) =1a(10) =377a(11) =1085a(12) =745a(13) =101a(14) =1a(15) =3323a(16) =11172a(17) =11534a(18) =3735a(19) =264a(20) =1a(21) =42518a(22) =153752a(23) =195801a(24) =99914a(25) =17808a(26) =715a(27) =1a(28) =646580a(29) =2464246

External references