Number of partitions of n that contain exactly one isolated singleton.

Terms

a(0) =0a(1) =1a(2) =0a(3) =1a(4) =1a(5) =3a(6) =5a(7) =12a(8) =24a(9) =56a(10) =123a(11) =292a(12) =682a(13) =1667a(14) =4079a(15) =10288a(16) =26159a(17) =68026a(18) =178823a(19) =478659a(20) =1296271a(21) =3564911a(22) =9919320a(23) =27978084a(24) =79816424a(25) =230520511a(26) =673071482a(27) =1987599262a(28) =5930739339a(29) =17883932293