151515

Appears in sequences

• Triplets: base 10 representation is the juxtaposition of three identical strings.at n=14A074842
• Numbers k such that 2*k-1, 4*k-1, 6*k-1, 8*k-1 and 10*k-1 are primes.at n=12A124488
• List of words over {1,5} with equal numbers of 1's and 5's.at n=13A214522