119557

Properties

Appears in sequences

• a(n) = number of n-lettered words in the alphabet {1, 2, 3} with as many occurrences of the substring (consecutive subword) [1, 1] as of [2, 2].at n=12A211277
• Primes whose base-9 representation also is the base-3 representation of a prime.at n=39A235472
• Number of vertices in a regular drawing of the complete bipartite graph K_{n,n}.at n=31A331755
• Prime numbersat n=11258