Coordination sequence for 12-dimensional cyclotomic lattice Z[zeta_21].

Terms

a(0) =1a(1) =21a(2) =231a(3) =1764a(4) =10479a(5) =51450a(6) =216531a(7) =800121a(8) =2642514a(9) =7913619a(10) =21754425a(11) =55475826a(12) =132425181a(13) =298205544a(14) =637710549a(15) =1302463575a(16) =2553071556a(17) =4823274561a(18) =8814149379a(19) =15629570544a(20) =26967111675a(21) =45382254246a(22) =74648134911a(23) =120238185669a(24) =189964987254a(25) =294815553375a(26) =450031184421a(27) =676489071006