Indices of octagonal numbers which are also triangular.
A046181
Indices of octagonal numbers which are also triangular.
Terms
- a(0) =1a(1) =3a(2) =63a(3) =261a(4) =6141a(5) =25543a(6) =601723a(7) =2502921a(8) =58962681a(9) =245260683a(10) =5777740983a(11) =24033043981a(12) =566159653621
External references
- oeis: A046181