Conjectured largest number that is not the sum of three generalized n-gonal numbers, or -1 if there is no largest number.

A118282

Conjectured largest number that is not the sum of three generalized n-gonal numbers, or -1 if there is no largest number.

Terms

    a(0) =0a(1) =-1a(2) =0a(3) =0a(4) =307a(5) =-1a(6) =2027a(7) =5200a(8) =18180a(9) =-1a(10) =10795a(11) =-1a(12) =87740a(13) =-1a(14) =75150a(15) =212048a(16) =122818a(17) =-1a(18) =146970a(19) =199153a(20) =585513

External references