Numbers n such that the sum of the hexagonal numbers H(n) and H(n+1) is equal to the sum of the pentagonal numbers P(m) and P(m+1) for some m.
A251990
Numbers n such that the sum of the hexagonal numbers H(n) and H(n+1) is equal to the sum of the pentagonal numbers P(m) and P(m+1) for some m.
Terms
- a(0) =52a(1) =10136a(2) =1966380a(3) =381467632a(4) =74002754276
External references
- oeis: A251990