Number of subsets of {2..n} containing no product of two or more (not necessarily distinct) elements.

A326114

Number of subsets of {2..n} containing no product of two or more (not necessarily distinct) elements.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =6a(5) =12a(6) =22a(7) =44a(8) =76a(9) =116a(10) =222a(11) =444a(12) =788a(13) =1576a(14) =3068a(15) =5740a(16) =8556a(17) =17112a(18) =31752a(19) =63504a(20) =116176a(21) =221104a(22) =438472a(23) =876944a(24) =1569424a(25) =2447664a(26) =4869576a(27) =9070920a(28) =17022360a(29) =34044720

External references