23553

Appears in sequences

• a(n) = a(n-1) + 2*a(floor(n/2)) if n > 0, otherwise 1.at n=32A058039
• (prime(n)*(prime(n+1)-1) + (prime(n)-1)*prime(n+1)) / 2.at n=34A099909
• Number of permutations of length n that avoid the patterns 132, 4321.at n=24A116701
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 421", based on the 5-celled von Neumann neighborhood.at n=32A272051
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 545", based on the 5-celled von Neumann neighborhood.at n=16A283011
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 801", based on the 5-celled von Neumann neighborhood.at n=16A284135
• Number of integer partitions of n such that the upper-left square of the Young diagram has strictly greater graph-distance from the lower-right boundary than any other square.at n=37A325187
• Indices of prime squares in A381019.at n=19A381095
• Numbers k such that sigma(k) = psi(k) + pi(k).at n=8A387999