26398
domain: N
Appears in sequences
- Number of hybrid binary trees with n internal nodes.at n=7A007863
- Triangle of numbers of hybrid rooted trees (divided by Fibonacci numbers).at n=28A011274
- a(n) = 6^n - 5^n - 4^n - 3^n + 3*2^n.at n=6A081685
- The number of odd numbers that require n Collatz (3x+1) iterations to reach 1.at n=52A176866
- Augmentation of the Fibonacci triangle A193588. See Comments.at n=35A193589
- Number A(n,k) of hybrid k-ary trees with n internal nodes; square array A(n,k), n>=0, k>=1, read by antidiagonals.at n=43A245049
- Indices of squares of primes in A098550.at n=39A251240