Irregular triangle read by rows, where the n-th row gives the number of steps in the hydra game when the initial hydra is each of the A000108(n) ordered trees with n edges (ordered by lexicographic order of their corresponding Dyck words as in A063171) and new heads are grown to the right.
A372592
Irregular triangle read by rows, where the n-th row gives the number of steps in the hydra game when the initial hydra is each of the A000108(n) ordered trees with n edges (ordered by lexicographic order of their corresponding Dyck words as in A063171) and new heads are grown to the right.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =3a(4) =3a(5) =4a(6) =5a(7) =7a(8) =11a(9) =4a(10) =5a(11) =6a(12) =8a(13) =12a(14) =7a(15) =9a(16) =11a(17) =15a(18) =23a(19) =31a(20) =79a(21) =447a(22) =1114111a(23) =5a(24) =6a(25) =7a(26) =9a(27) =13a(28) =8a(29) =10
External references
- oeis: A372592