a(1) = 1; for n>1, a(n) = (c(n) + c(n+1))/2, where c(n) = A130168(n).
A130169
a(1) = 1; for n>1, a(n) = (c(n) + c(n+1))/2, where c(n) = A130168(n).
Terms
- a(0) =1a(1) =2a(2) =9a(3) =63a(4) =621a(5) =8127a(6) =135729a(7) =2810403a(8) =70558101a(9) =2109957687a(10) =74061977049
External references
- oeis: A130169