a(n) is the sum of all integers from 5^n to 5^(n+1)-1.
A291658
a(n) is the sum of all integers from 5^n to 5^(n+1)-1.
Terms
- a(0) =10a(1) =290a(2) =7450a(3) =187250a(4) =4686250a(5) =117181250a(6) =2929656250a(7) =73242031250
External references
- oeis: A291658