Number of points of L1 norm 7 in cubic lattice Z^n.

Terms

a(0) =0a(1) =2a(2) =28a(3) =198a(4) =952a(5) =3530a(6) =10836a(7) =28814a(8) =68464a(9) =148626a(10) =299660a(11) =568150a(12) =1022760a(13) =1761370a(14) =2919620a(15) =4680990a(16) =7288544a(17) =11058466a(18) =16395516a(19) =23810534a(20) =33940120a(21) =47568618a(22) =65652532a(23) =89347502a(24) =120037968a(25) =159369650a(26) =209284972