494927872

Appears in sequences

• a(n) = -2*a(n-1) + 4*a(n-3), with a(0) = 1, a(1) = -2, a(2) = 4.at n=32A099211
• a(n) is the least number with n prime factors (counted with multiplicity) that is the concatenation of two primes.at n=23A374669