Indices of the 12-gonal numbers which are also centered 12-gonal number or numbers X such that 30*X^2-24*X+3 is a square.
A133284
Indices of the 12-gonal numbers which are also centered 12-gonal number or numbers X such that 30*X^2-24*X+3 is a square.
Terms
- a(0) =1a(1) =13a(2) =277a(3) =6073a(4) =133321a(5) =2926981a(6) =64260253a(7) =1410798577a(8) =30973308433a(9) =680001986941
External references
- oeis: A133284