355017

Appears in sequences

• a(n) = 2*a(n-1) + 2*a(n-2) + 2*a(n-3) - a(n-4); a(0)=0, a(1)=1, a(2)=3, a(3)=9, a(4)=25.at n=13A138574
• G.f. is the cube of the g.f. of A006950.at n=26A273226