7028736

Appears in sequences

• Number of simple allowable sequences on 1..n.at n=5A018241
• Apart from the leading term, a(n) = Catalan(n-1)*4^(n-1).at n=8A052704
• Expansion of (-1 + 1/(1-8*x)^8)/(64*x); related to A053107.at n=5A053111
• 8-fold convolution of A000302 (powers of 4).at n=6A054338
• a(n) = 4^n*binomial(2*n+1, n).at n=6A098400
• Expansion of e.g.f. BesselI(0,4*x)+BesselI(1,4*x)/2.at n=13A098664
• a(n) = (n^3 - n)*2^n.at n=11A128960
• C(n+9, 9)*(n+5)*(-1)^(n+1)*256/5.at n=7A138333
• Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0), ending on the vertical axis and consisting of 2*n steps taken from {(-1, 0), (-1, 1), (1, 0), (1, 1)}.at n=7A151403
• a(n) = 2^n*n!/((floor(n/2)+1)*floor(n/2)!^2).at n=14A240558
• a(n) = (9*n)!*(5/2*n)!/((9*n/2)!*(5*n)!*(2*n)!).at n=3A276099