164450

Appears in sequences

• Seventh column of Catalan triangle A009766.at n=14A064059
• Molien series for complete weight enumerators of self-dual codes over GF(9).at n=17A092071
• Triangle read by rows: T(n,k) = (4k+3)/(n+2k+2)*binomial(2n,n+2k+1).at n=46A158483
• a(n) = 2*binomial(7*n-1,2*n)/(7*n-1).at n=3A322631
• G.f. A(x) satisfies A(x) = 1 + x^4*A(x)^4*(1 + x*A(x)).at n=26A365730
• Number of achiral polyominoes composed of n tetrahedral cells of the hyperbolic regular tiling with Schläfli symbol {3,3,oo}.at n=17A371351