Maximal number of bonds joining n nodes in simple cubic lattice.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =5a(5) =7a(6) =9a(7) =12a(8) =13a(9) =15a(10) =17a(11) =20a(12) =21a(13) =23a(14) =25a(15) =28a(16) =30a(17) =33a(18) =34a(19) =36a(20) =38a(21) =41a(22) =43a(23) =46a(24) =48a(25) =51a(26) =54a(27) =55a(28) =57a(29) =59