a(n) = (1 + Sum_{j=1..K-1} a(n-j) + a(n-1)*a(n-K+1))/a(n-K) with a(1),...,a(K)=1, where K=5.

A283330

a(n) = (1 + Sum_{j=1..K-1} a(n-j) + a(n-1)*a(n-K+1))/a(n-K) with a(1),...,a(K)=1, where K=5.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =6a(6) =16a(7) =41a(8) =106a(9) =806a(10) =2311a(11) =6126a(12) =16066a(13) =122401a(14) =351136a(15) =931006a(16) =2441881a(17) =18604041a(18) =53370241a(19) =141506681a(20) =371149801a(21) =2827691726a(22) =8111925376a(23) =21508084401a(24) =56412327826a(25) =429790538206

External references