Number of points of L1 norm 4 in cubic lattice Z^n.

Terms

a(0) =0a(1) =2a(2) =16a(3) =66a(4) =192a(5) =450a(6) =912a(7) =1666a(8) =2816a(9) =4482a(10) =6800a(11) =9922a(12) =14016a(13) =19266a(14) =25872a(15) =34050a(16) =44032a(17) =56066a(18) =70416a(19) =87362a(20) =107200a(21) =130242a(22) =156816a(23) =187266a(24) =221952a(25) =261250a(26) =305552a(27) =355266a(28) =410816a(29) =472642