a(n) = (1 + 2)^3 + (4 + 5)^6 + (7 + 8)^9 + (10 + 11)^12 + ... + (up to n).
A319391
a(n) = (1 + 2)^3 + (4 + 5)^6 + (7 + 8)^9 + (10 + 11)^12 + ... + (up to n).
Terms
- a(0) =1a(1) =3a(2) =27a(3) =31a(4) =36a(5) =531468a(6) =531475a(7) =531483a(8) =38443890843a(9) =38443890853a(10) =38443890864
External references
- oeis: A319391