81908

Appears in sequences

• a(n) = the least positive integer k such that Omega(n+k) = Omega(k)+n, where Omega(m) (A001222) denotes the number of prime factors of m, counting multiplicity.at n=11A076158
• Start with a square of dimension 1 X 1, and repeatedly append along the squares of the previous step squares with half their side length that do not overlap with any prior square; a(n) gives the number of squares appended at n-th step.at n=13A321237