The integer part of the surface area of the 4-dimensional sphere of radius n.

Terms

a(0) =19a(1) =157a(2) =532a(3) =1263a(4) =2467a(5) =4263a(6) =6770a(7) =10106a(8) =14389a(9) =19739a(10) =26272a(11) =34109a(12) =43367a(13) =54164a(14) =66619a(15) =80851a(16) =96978a(17) =115119a(18) =135391a(19) =157913a(20) =182804a(21) =210183a(22) =240166a(23) =272874a(24) =308425a(25) =346936a(26) =388526a(27) =433315a(28) =481419a(29) =532958