a(n) is the surface area of the symmetric tower described in A221529 which is a polycube whose successive terraces are the symmetric representation of sigma A000203(i) (from i = 1 to n) starting from the top and the levels of these terraces are the partition numbers A000041(h-1) (from h = 1 to n) starting from the base.
A345023
a(n) is the surface area of the symmetric tower described in A221529 which is a polycube whose successive terraces are the symmetric representation of sigma A000203(i) (from i = 1 to n) starting from the top and the levels of these terraces are the partition numbers A000041(h-1) (from h = 1 to n) starting from the base.
Terms
- a(0) =6a(1) =16a(2) =32a(3) =58a(4) =90a(5) =142a(6) =202a(7) =292a(8) =406a(9) =562a(10) =754a(11) =1034a(12) =1370a(13) =1822a(14) =2410a(15) =3176a(16) =4136a(17) =5402a(18) =6982a(19) =9026a(20) =11598a(21) =14838a(22) =18894a(23) =24034a(24) =30396a(25) =38312a(26) =48136a(27) =60288a(28) =75220a(29) =93624
External references
- oeis: A345023