151651

Properties

Appears in sequences

• a(1) = 1; for n > 1, a(n) is the smallest prime divisor of the number formed by the concatenation of a(1) to a(n-1) that has not previously appeared in the sequence.at n=19A330291
• Bemirps that also interpret 2 and 5 as upside-down forms of each other, assuming a digital font.at n=19A335731
• Prime numbersat n=13994