Coordination sequence for 15-dimensional cubic lattice.

Terms

a(0) =1a(1) =30a(2) =450a(3) =4510a(4) =34050a(5) =207006a(6) =1057730a(7) =4680990a(8) =18347010a(9) =64797470a(10) =209070018a(11) =623207070a(12) =1732242690a(13) =4524812190a(14) =11180805570a(15) =26283115038a(16) =59064045570a(17) =127421652510a(18) =264870794690a(19) =532225891230