Number of ways to choose a subset s of [n] and then for each element in s choose a different prime factor.

A370648

Number of ways to choose a subset s of [n] and then for each element in s choose a different prime factor.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =6a(5) =12a(6) =22a(7) =44a(8) =56a(9) =76a(10) =130a(11) =260a(12) =376a(13) =752a(14) =1248a(15) =1948a(16) =2224a(17) =4448a(18) =5808a(19) =11616a(20) =16016a(21) =24000a(22) =38416a(23) =76832a(24) =94656a(25) =114736a(26) =181992a(27) =204024a(28) =274056a(29) =548112

External references