Number of distinct values taken by 6th derivative of x^x^...^x (with n x's and parentheses inserted in all possible ways) at x=1.
A199883
Number of distinct values taken by 6th derivative of x^x^...^x (with n x's and parentheses inserted in all possible ways) at x=1.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =20a(6) =48a(7) =113a(8) =262a(9) =591a(10) =1263a(11) =2505a(12) =4764a(13) =8479a(14) =14285a(15) =22871a(16) =35316a(17) =52755a(18) =76517a(19) =107826a(20) =148914a(21) =202715a(22) =270622
External references
- oeis: A199883