212944

Appears in sequences

• Let S denote the palindromes in the language {0,1,2,3}*; a(n) = number of words of length n in the language SS.at n=13A007057
• Number of 6-step E, S, NW and NE-moving king's tours on an n X n board summed over all starting positions.at n=19A187589
• Number of n X 4 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 4 neighboring 1s.at n=9A297729