a(n) is the denominator of Sum_{k = 1..n} 1 / (k*A374663(k)).

A375516

a(n) is the denominator of Sum_{k = 1..n} 1 / (k*A374663(k)).

Terms

    a(0) =1a(1) =2a(2) =4a(3) =12a(4) =48a(5) =1200a(6) =241200a(7) =9696481200

External references