4700771

Appears in sequences

• Diagonal sums of Riordan array (1/(1+x),x(1+x)/(1-x)).at n=28A112476
• Number of binary strings of length n with no substrings equal to 0001 or 1000.at n=21A164398
• Number of nX5 0..1 arrays with every element equal to 0 or 1 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=22A301787