43337

Appears in sequences

• Number of asymmetric rooted trees with a forbidden limb of length 3.at n=19A052325
• Binomial transform of [1, 4, 10, 20, 0, 0, 0, ...].at n=24A143131
• Integers n such that 17+30*n are terms in A172456.at n=21A175103
• a(n) = smallest composite (odd) number greater than a(n-1) such that a(n)+2n is the first prime after a(n).at n=26A189118
• Composite numbers and 1 which yield a prime whenever a 3 is inserted anywhere in them (including at the beginning or end).at n=41A216166
• Composite squarefree numbers n such that p-d(n) divides n-d(n), where p are the prime factors of n and d(n) the number of divisors of n.at n=19A228300
• Number of first/rest balanced rooted plane trees with n nodes.at n=26A318049