515425

Appears in sequences

• Number of n X n X n 0..6 triangular arrays with each element x equal to the number its neighbors equal to 5,3,0,1,0,1,0 for x=0,1,2,3,4,5,6.at n=5A203202
• G.f.: Sum_{n>=1} x^n * (1+x)^n / (1-x^n).at n=27A227635