102774

Appears in sequences

• n is equal to the number of 1's in all numbers <= n written in base 9.at n=3A014884
• Number of Dyck paths of semilength n such that every peak at level y > 1 is preceded by (at least) one peak at level y-1 and is followed by (at least) one peak at level y-1.at n=16A287776