Numbers n such that the triangular number T(n) is equal to the sum of the pentagonal numbers P(m) and P(m+1) for some m.
A249164
Numbers n such that the triangular number T(n) is equal to the sum of the pentagonal numbers P(m) and P(m+1) for some m.
Terms
- a(0) =1a(1) =3a(2) =113a(3) =331a(4) =11121a(5) =32483a(6) =1089793a(7) =3183051a(8) =106788641a(9) =311906563a(10) =10464197073a(11) =30563660171
External references
- oeis: A249164