66496

Appears in sequences

• Half the number of permutations of 0..n with a zero n-th difference.at n=10A131502
• Triangle of Gely numbers, read by rows.at n=58A132795
• Let S denote the palindromes in the language {0,1,2,...,n-1}*; a(n) = number of words of length 4 in the language SS.at n=31A187277
• Number of -n..n arrays x(0..3) of 4 elements with sum zero and with zeroth through 3rd differences all nonzero.at n=23A200040
• In the ternary Pi race between digits zero and one, where the race leader changes.at n=21A278974