Number of subsets of {1, 2, ..., n} containing n and having <=5 pairwise coprime elements.

Terms

a(0) =1a(1) =2a(2) =4a(3) =4a(4) =12a(5) =4a(6) =28a(7) =16a(8) =32a(9) =12a(10) =110a(11) =16a(12) =209a(13) =46a(14) =69a(15) =98a(16) =507a(17) =57a(18) =828a(19) =141a(20) =277a(21) =193a(22) =1591a(23) =163a(24) =1289a(25) =413a(26) =1101a(27) =441a(28) =3785a(29) =163