43405

Appears in sequences

• a(n) = ceiling(a(n-1)/2) + a(n-2) with a(0)=0 and a(1)=1.at n=43A064651
• Starting positions of strings of four 2's in the decimal expansion of Pi.at n=3A083607
• Number of partitions of n^2 into exactly 4 prime numbers.at n=37A243940
• Least positive integer k such that both k and k*n belong to the set {m>0: 2*prime(prime(m))+1 = prime(p) for some prime p}.at n=16A261362