Least positive integer that gives a square of an integer when multiplied by the n-th harmonic number.

A382329

Least positive integer that gives a square of an integer when multiplied by the n-th harmonic number.

Terms

    a(0) =1a(1) =6a(2) =66a(3) =12a(4) =8220a(5) =20a(6) =420a(7) =213080a(8) =17965080a(9) =153720a(10) =2320468920a(11) =14109480a(12) =412970037480a(13) =422245703880a(14) =430902992520a(15) =6076390320a(17) =161488607280a(21) =186715152624

External references