66078

Appears in sequences

• a(n) = floor(tau*a(n-1)) + floor(tau*a(n-2)) with a(0)=0 and a(1)=2.at n=14A005909
• Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n having k ascents of length 2.at n=43A102402
• Numbers k such that k + sigma(k) + sigma(sigma(k)) is a repdigit.at n=11A116028