39685

Appears in sequences

• n+p(n)+p(p(n)) is a square, where p(n) is the n-th prime.at n=13A116011
• Number of nX2 0..3 arrays with no more than floor(nX2/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order.at n=10A222473
• a(n) is the least number that reaches 1 after n iterations of the infinitary totient function A064380.at n=36A362025