a(n) is the smallest number which can be represented as the sum of n distinct nonzero n-gonal pyramidal numbers in exactly n ways, or -1 if no such number exists.

A350397

a(n) is the smallest number which can be represented as the sum of n distinct nonzero n-gonal pyramidal numbers in exactly n ways, or -1 if no such number exists.

Terms

    a(0) =305a(1) =1980a(2) =1900a(3) =3321a(4) =5256a(5) =8310a(6) =12516a(7) =17108a(8) =24832a(9) =34249a(10) =42381a(11) =61697a(12) =78766a(13) =106956a(14) =132994a(15) =170325a(16) =203415a(17) =266595a(18) =322943a(19) =393828a(20) =475520a(21) =569416a(22) =695799a(23) =823447a(24) =958300a(25) =1149125a(26) =1313545a(27) =1565055a(28) =1802736a(29) =2088119

External references