Smallest m such that m can be written in exactly n ways as x^2 + xy + y^2 with 0 <= x <= y.
A198799
Smallest m such that m can be written in exactly n ways as x^2 + xy + y^2 with 0 <= x <= y.
Terms
- a(0) =2a(1) =0a(2) =49a(3) =637a(4) =1729a(5) =8281a(6) =12103a(7) =1529437a(8) =53599a(9) =157339a(10) =593047a(11) =19882681a(12) =375193a(13) =68574961a(14) =2989441a(15) =7709611a(16) =1983163a(17) =47738317081a(18) =4877509a(20) =18384457a(21) =377770939a(22) =69771386503a(23) =146482609a(24) =13882141a(25) =1302924259a(27) =92672671
External references
- oeis: A198799