184480

Appears in sequences

• a(n) = 4*(n-1)*a(n-1) -2*(n-1)*a(n-2), with a(0)=0, a(1)=2.at n=6A108208
• Sum of the asymmetry degrees of all compositions of n with parts in {1,5}.at n=41A276065
• p-INVERT of (1,0,0,0,1,0,0,0,0,0,...), where p(S) = (1 - S)^2.at n=34A292325