41116

Appears in sequences

• Numbers n, not divisible by 3, 5, 7 or 11, such that A000203(n)-n-1 and 2*n+1-A000203(n) are prime numbers.at n=14A180268
• Number of placements of brackets in a monomial of degree n in an algebra with two commutative multiplications.at n=9A226909
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 521", based on the 5-celled von Neumann neighborhood.at n=7A272735