50081

Appears in sequences

• Strong pseudoprimes to base 99.at n=28A020325
• Least k such that the first k terms of the Kolakoski sequence (A000002) contain n more 2's than 1's.at n=32A025503
• a(n) = index where A088568 (or equally A294448) first reaches or exceeds n in magnitude.at n=32A294449
• Numbers k such that prime(k+1)^prime(k+3) == prime(k) mod prime(k+2).at n=29A335571