Numbers k such that 2*k+1 and 10*k+1 are both triangular numbers (A000217).
A279042
Numbers k such that 2*k+1 and 10*k+1 are both triangular numbers (A000217).
Terms
- a(0) =4455a(1) =30537a(2) =461938302a(3) =3166172226
External references
- oeis: A279042