1052272

Appears in sequences

• Number of (n+1)X(3+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or vertically, with no adjacent elements equal.at n=11A232401
• a(n) is the number of permutations of length n that have the same number of fixed points whether forwards or backwards.at n=10A334830