Harmonic numbers k such that k*p is not a harmonic number for all the primes p that do not divide k.

A335369

Harmonic numbers k such that k*p is not a harmonic number for all the primes p that do not divide k.

Terms

    a(0) =1a(1) =6a(2) =140a(3) =496a(4) =672a(5) =2970a(6) =27846a(7) =105664a(8) =173600a(9) =237510a(10) =539400a(11) =695520a(12) =726180a(13) =753480a(14) =1421280a(15) =1539720a(16) =2229500a(17) =2290260a(18) =8872200a(19) =11981970a(20) =14303520a(21) =15495480a(22) =33550336a(23) =50401728a(24) =71253000a(25) =80832960a(26) =90409410a(27) =144963000a(28) =221557248a(29) =233103780

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