Number of distinct solutions of sum{i=1..7}(x(2i-1)*x(2i)) = 0 (mod n), with x() in 0..n-1.

A180799

Number of distinct solutions of sum{i=1..7}(x(2i-1)*x(2i)) = 0 (mod n), with x() in 0..n-1.

Terms

    a(0) =1a(1) =20a(2) =270a(3) =3000a(4) =23282a(5) =151473a(6) =768541a(7) =3422978a(8) =12879078a(9) =44111410a(10) =133919379a(11) =381516366a(12) =988173838a(13) =2446846672a(14) =5633359713a(15) =12527643860a(16) =26226659375a(17) =53655084387a(18) =104124710377a(19) =198817175068a(20) =363133886202a(21) =654527617329

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