Sub-triangle of A060187 formed by taking every third-indexed term of every third row.
A177827
Sub-triangle of A060187 formed by taking every third-indexed term of every third row.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =23548a(5) =1a(6) =1a(7) =21707972a(8) =21707972a(9) =1a(10) =1a(11) =10708911188a(12) =743288515164a(13) =10708911188a(14) =1a(15) =1a(20) =1a(21) =1
External references
- oeis: A177827