Length of n-th term of A006711.

Terms

a(0) =1a(1) =2a(2) =2a(3) =4a(4) =4a(5) =8a(6) =10a(7) =12a(8) =14a(9) =20a(10) =24a(11) =30a(12) =38a(13) =54a(14) =66a(15) =92a(16) =120a(17) =160a(18) =210a(19) =284a(20) =378a(21) =490a(22) =632a(23) =852a(24) =1134a(25) =1492a(26) =1942a(27) =2608a(28) =3496a(29) =4622