3223729

Properties

Appears in sequences

• a(1) = 2; a(2n) = smallest prime starting (the most significant digits) with a(2n-1) (i.e., as a right concatenation of a(2n-1) and a number with no insignificant zeros); a(2n+1) = smallest prime ending in (the least significant digits) a(2n-1). Alternate left and right concatenation yielding primes.at n=5A069614
• Number of n X n rook placements avoiding the pattern 012.at n=9A221957
• Prime numbersat n=231817