Numbers m such that T(m) + 2*T(m+1) is a square, where T = A000217.
A278438
Numbers m such that T(m) + 2*T(m+1) is a square, where T = A000217.
Terms
- a(0) =7a(1) =799a(2) =78407a(3) =7683199a(4) =752875207a(5) =73774087199
External references
- oeis: A278438