a(n) is the sum of the entries in an n X n X n 3D matrix whose elements start at 1 in the corner cells and increase by 1 with each step towards the center.
A350236
a(n) is the sum of the entries in an n X n X n 3D matrix whose elements start at 1 in the corner cells and increase by 1 with each step towards the center.
Terms
- a(0) =1a(1) =8a(2) =54a(3) =160a(4) =425a(5) =864a(6) =1666a(7) =2816a(8) =4617a(9) =7000a(10) =10406a(11) =14688a(12) =20449a(13) =27440a(14) =36450a(15) =47104a(16) =60401a(17) =75816a(18) =94582a(19) =116000a(20) =141561a(21) =170368a(22) =204194a(23) =241920a(24) =285625a(25) =333944a(26) =389286a(27) =450016a(28) =518897a(29) =594000
External references
- oeis: A350236