155060

Appears in sequences

• From George Gilbert's marks problem: jumping 6 marks at a time (initial positions).at n=28A019995
• Numbers k for which k = phi(k') + phi(k''), where phi is the Euler totient function (A000010), k' the arithmetic derivative of k (A003415) and k'' the second arithmetic derivative of k (A068346).at n=32A352332