41796

Appears in sequences

• a(1) = 1; a(n) = smallest number such that the concatenation a(1)a(2)...a(n) is a square.at n=4A061110
• Records in A065925.at n=29A065927
• Fourth row of the Pascal-(1,4,1) array A081579.at n=13A081588
• Record differences for n^2 - phi(n)*sigma(n).at n=37A164876
• Numbers k such that k +- 2 and k +- 3 are all semiprimes.at n=15A382049