221312

Appears in sequences

• A doubly-fractal sequence. Erase the first (leftmost) digit of every integer: what is left is the sequence itself. The erased digits, one by one, form also the sequence itself.at n=46A127274
• a(n) = 2*n*A071148(n).at n=37A177082
• Number of n X 5 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically.at n=11A207065
• Numbers all of whose divisors are odious numbers (A000069) with a record number of divisors.at n=21A330289
• Numbers m such that A357761(m) > A357761(k) for all k < m.at n=21A357763