137439477756
domain: N
Appears in sequences
- Number of primitive (aperiodic) reversible strings with n beads using a maximum of four different colors.at n=18A056315
- Least k such that k-1 and k+1 in binary representation have same number n of 0's as 1's.at n=17A191296
- Number of n-tuples of 4 elements excluding reverse duplicates and those consisting of repetitions of the same element only.at n=19A321579