Number of balanced orbitals over n sectors.

Terms

a(0) =1a(1) =1a(2) =0a(3) =0a(4) =2a(5) =6a(6) =0a(7) =6a(8) =8a(9) =36a(10) =0a(11) =88a(12) =58a(13) =376a(14) =0a(15) =1096a(16) =526a(17) =4476a(18) =0a(19) =14200a(20) =5448a(21) =57284a(22) =0a(23) =190206a(24) =61108a(25) =764812a(26) =0a(27) =2615268a(28) =723354a(29) =10499504