a(n) is the number of squarefree composite k with lpf(k) = prime(n) such that m <= Omega(k), where lpf = A020639, m = floor(log k / log lpf(k)), and Omega = A001222.

A377793

a(n) is the number of squarefree composite k with lpf(k) = prime(n) such that m <= Omega(k), where lpf = A020639, m = floor(log k / log lpf(k)), and Omega = A001222.

Terms

    a(0) =1a(1) =2a(2) =9a(3) =21a(4) =128a(5) =194a(6) =713a(7) =874a(8) =2276a(9) =11898a(10) =12522a(11) =52469a(12) =103824a(13) =99930a(14) =173685a(15) =534743a(16) =1608864a(17) =1438340a(18) =3894769a(19) =5881191a(20) =5008669a(21) =11802600a(22) =16274460a(23) =36220208a(24) =132526590a(25) =178177142

External references