Consider Leibniz's harmonic triangle (A003506) and look at the non-boundary terms. Sequence gives numbers appearing in denominators, sorted.

A007622

Consider Leibniz's harmonic triangle (A003506) and look at the non-boundary terms. Sequence gives numbers appearing in denominators, sorted.

Terms

    a(0) =6a(1) =12a(2) =20a(3) =30a(4) =42a(5) =56a(6) =60a(7) =72a(8) =90a(9) =105a(10) =110a(11) =132a(12) =140a(13) =156a(14) =168a(15) =182a(16) =210a(17) =240a(18) =252a(19) =272a(20) =280a(21) =306a(22) =342a(23) =360a(24) =380a(25) =420a(26) =462a(27) =495a(28) =504a(29) =506

External references