a(n) is the smallest number which can be represented as the sum of n distinct nonzero n-gonal numbers in exactly 2 ways.

A377729

a(n) is the smallest number which can be represented as the sum of n distinct nonzero n-gonal numbers in exactly 2 ways.

Terms

    a(0) =19a(1) =90a(2) =162a(3) =299a(4) =509a(5) =816a(6) =1248a(7) =1837a(8) =2619a(9) =3634a(10) =4926a(11) =6543a(12) =8537a(13) =10964a(14) =13884a(15) =17361a(16) =21463a(17) =26262a(18) =31834a(19) =38259a(20) =45621a(21) =54008a(22) =63512a(23) =74229a(24) =86259a(25) =99706a(26) =114678a(27) =131287a(28) =149649a(29) =169884

External references