Number of distinct values taken by 4th derivative of x^x^...^x (with n x's and parentheses inserted in all possible ways) at x=1.
A199205
Number of distinct values taken by 4th 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) =17a(6) =30a(7) =50a(8) =77a(9) =113a(10) =156a(11) =212a(12) =279a(13) =355a(14) =447a(15) =560a(16) =684a(17) =822a(18) =985a(19) =1171a(20) =1375a(21) =1599a(22) =1856a(23) =2134a(24) =2445a(25) =2769a(26) =3125a(27) =3519a(28) =3939a(29) =4376
External references
- oeis: A199205