Number of subsets of {1..n} containing n such that no two elements have the same sorted prime signature.
A325263
Number of subsets of {1..n} containing n such that no two elements have the same sorted prime signature.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =6a(4) =4a(5) =16a(6) =8a(7) =40a(8) =40a(9) =60a(10) =36a(11) =216a(12) =72a(13) =168a(14) =168a(15) =840a(16) =240a(17) =960a(18) =360a(19) =1080a(20) =864a(21) =864a(22) =672a(23) =6720a(24) =4480a(25) =2560a(26) =10240a(27) =7680a(28) =3840a(29) =42240
External references
- oeis: A325263