Indices of pentagonal numbers which are also triangular.
A046174
Indices of pentagonal numbers which are also triangular.
Terms
- a(0) =0a(1) =1a(2) =12a(3) =165a(4) =2296a(5) =31977a(6) =445380a(7) =6203341a(8) =86401392a(9) =1203416145a(10) =16761424636a(11) =233456528757
External references
- oeis: A046174