Coordination sequence for root lattice B_7.

Terms

a(0) =1a(1) =98a(2) =1946a(3) =16394a(4) =83442a(5) =307314a(6) =907018a(7) =2282394a(8) =5095650a(9) =10368386a(10) =19594106a(11) =34866218a(12) =59021522a(13) =95799186a(14) =150015210a(15) =227752378a(16) =336565698a(17) =485703330a(18) =686343002a(19) =951843914a(20) =1298014130a(21) =1743393458a(22) =2309551818a(23) =3021403098a(24) =3907534498a(25) =5000551362a(26) =6337437498a(27) =7959930986