a(n) is the smallest nonnegative integer k where exactly n ordered pairs of positive integers (x, y) exist such that x^2 + x*y + y^2 = k.

A374090

a(n) is the smallest nonnegative integer k where exactly n ordered pairs of positive integers (x, y) exist such that x^2 + x*y + y^2 = k.

Terms

    a(0) =0a(1) =3a(2) =7a(3) =147a(4) =91a(5) =7203a(6) =637a(7) =352947a(8) =1729a(9) =24843a(10) =31213a(11) =847425747a(12) =12103a(13) =41523861603a(14) =405769a(15) =1217307a(16) =53599a(18) =157339a(20) =593047a(21) =59648043

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