Configurations of linear chains in a cubic lattice.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =288a(5) =2112a(6) =11928a(7) =66192a(8) =353544a(9) =1817208a(10) =9092592a(11) =44547912a(12) =214532136a(13) =1019264736a(14) =4783813296a(15) =22238211480a(16) =102424615968a(17) =468396156360