Number of n-bead necklaces labeled with numbers -5..5 allowing reversal, with sum zero and first differences in -5..5.
A209029
Number of n-bead necklaces labeled with numbers -5..5 allowing reversal, with sum zero and first differences in -5..5.
Terms
- a(0) =1a(1) =3a(2) =7a(3) =38a(4) =187a(5) =1237a(6) =8235a(7) =58524a(8) =422504a(9) =3117158a(10) =23290361a(11) =176103500a(12) =1344136056a(13) =10344670554a(14) =80181862705a(15) =625395356182
External references
- oeis: A209029