Binomial transform of A066247 (characteristic function of composite numbers).

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =5a(6) =16a(7) =42a(8) =99a(9) =220a(10) =476a(11) =1023a(12) =2201a(13) =4732a(14) =10102a(15) =21284a(16) =44103a(17) =89845a(18) =180354a(19) =358226a(20) =707561a(21) =1396560a(22) =2764906a(23) =5501807a(24) =11005363a(25) =22101301a(26) =44470622a(27) =89475559a(28) =179753753a(29) =360325116