Denominators of the partial sums of the reciprocals of twice the heptagonal numbers (k + 1)*(5*k + 2) = A135706(k+1) = 2*A000566(k+1), for k >= 0.

A294827

Denominators of the partial sums of the reciprocals of twice the heptagonal numbers (k + 1)*(5*k + 2) = A135706(k+1) = 2*A000566(k+1), for k >= 0.

Terms

    a(0) =2a(1) =7a(2) =252a(3) =2142a(4) =58905a(5) =1060290a(6) =16964640a(7) =627691680a(8) =627691680a(9) =29501508960a(10) =383519616480

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