a(n) is the least integer that can be expressed as the difference of two pentagonal numbers in exactly n ways.

A334034

a(n) is the least integer that can be expressed as the difference of two pentagonal numbers in exactly n ways.

Terms

    a(0) =1a(1) =22a(2) =70a(3) =715a(4) =1330a(5) =4025a(6) =6370a(7) =14014a(8) =17290a(9) =25025a(10) =45815a(11) =73150a(12) =121030a(13) =95095a(14) =85085a(15) =256025a(16) =350350a(17) =432250a(18) =1179178a(19) =425425a(20) =575575a(21) =734825a(22) =950950a(23) =1926925a(24) =3751930a(25) =2187185a(26) =1616615a(27) =1956955a(28) =3148145a(29) =3658655

External references