Crystal ball sequence for 7-dimensional cubic lattice.

Terms

a(0) =1a(1) =15a(2) =113a(3) =575a(4) =2241a(5) =7183a(6) =19825a(7) =48639a(8) =108545a(9) =224143a(10) =433905a(11) =795455a(12) =1392065a(13) =2340495a(14) =3800305a(15) =5984767a(16) =9173505a(17) =13726991a(18) =20103025a(19) =28875327a(20) =40754369a(21) =56610575a(22) =77500017a(23) =104692735a(24) =139703809a(25) =184327311a(26) =240673265a(27) =311207743a(28) =398796225a(29) =506750351