Number of 5-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero and first differences in -n..n.

A208996

Number of 5-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero and first differences in -n..n.

Terms

    a(0) =3a(1) =17a(2) =59a(3) =159a(4) =351a(5) =683a(6) =1207a(7) =1989a(8) =3099a(9) =4623a(10) =6647a(11) =9277a(12) =12615a(13) =16787a(14) =21913a(15) =28137a(16) =35597a(17) =44455a(18) =54867a(19) =67015a(20) =81071a(21) =97237a(22) =115701a(23) =136685a(24) =160395a(25) =187071a(26) =216937a(27) =250251a(28) =287255a(29) =328227

External references