Nonnegative integers m such that 10*m*(m+1)+1 is a square.
A222390
Nonnegative integers m such that 10*m*(m+1)+1 is a square.
Terms
- a(0) =0a(1) =3a(2) =15a(3) =132a(4) =588a(5) =5031a(6) =22347a(7) =191064a(8) =848616a(9) =7255419a(10) =32225079a(11) =275514876a(12) =1223704404a(13) =10462309887a(14) =46468542291a(15) =397292260848
External references
- oeis: A222390