Number of distinct values taken by 6^6^...^6 (with n 6's and parentheses inserted in all possible ways).
A145546
Number of distinct values taken by 6^6^...^6 (with n 6's and parentheses inserted in all possible ways).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =20a(6) =48a(7) =115a(8) =286a(9) =718a(10) =1838a(11) =4750a(12) =12431a(13) =32790a(14) =87225a(15) =233534a(16) =629123a(17) =1703586a(18) =4635181a(19) =12664335a(20) =34734322a(21) =95592704a(22) =263909594
External references
- oeis: A145546