117571

Properties

Appears in sequences

• Numbers in Morse code, with 1 for a dot, 2 for a dash and 0 between digits/letters and then converted from base 3 to base 10.at n=16A060110
• Primes p such that sigma(p+1) = sigma(p-1).at n=4A067891
• Duplicate of A067891.at n=4A068357
• a(n) = 2*C(n) - 1, where C(n) = A000108(n) are the Catalan numbers.at n=11A131428
• Prime numbersat n=11094