42907

Appears in sequences

• Number of ordered trees with n edges and no unary or binary nodes.at n=17A114997
• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1111-0011 pattern in any orientation.at n=12A147461
• Composite numbers n such that every divisor of n greater than one contains the digit 0.at n=10A243819
• Number of multisets of nonempty words with a total of n letters over quaternary alphabet such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.at n=11A293734