Coordination sequence for C_5 lattice.

Terms

a(0) =1a(1) =50a(2) =450a(3) =1970a(4) =5890a(5) =14002a(6) =28610a(7) =52530a(8) =89090a(9) =142130a(10) =216002a(11) =315570a(12) =446210a(13) =613810a(14) =824770a(15) =1086002a(16) =1404930a(17) =1789490a(18) =2248130a(19) =2789810a(20) =3424002a(21) =4160690a(22) =5010370a(23) =5984050a(24) =7093250a(25) =8350002