Number of n-bead necklaces labeled with numbers -4..4 not allowing reversal, with sum zero and first differences in -4..4.
A208989
Number of n-bead necklaces labeled with numbers -4..4 not allowing reversal, with sum zero and first differences in -4..4.
Terms
- a(0) =1a(1) =3a(2) =7a(3) =33a(4) =159a(5) =874a(6) =4935a(7) =28816a(8) =171413a(9) =1036611a(10) =6350875a(11) =39346156a(12) =246076193a(13) =1551630136a(14) =9853551873a(15) =62966367376a(16) =404595868611
External references
- oeis: A208989