26676

Appears in sequences

• Number of n-step walks on square lattice in the first quadrant which finish at distance n-3 from the x-axis.at n=35A005564
• Coefficient of x^4 in expansion of (1+x+x^2)^n.at n=25A005712
• 11-gonal (or hendecagonal) pyramidal numbers: a(n) = n*(n+1)*(3*n-2)/2.at n=26A007586
• a(n) is the decimal concatenation of n and n^2.at n=25A053061
• a(n) = binomial(n+1,2)*6^2.at n=38A162940
• Number of tilings of a 3 X n rectangle using dominoes and right trominoes.at n=9A165716
• Numbers n with property that 42*n+37 is in A175284.at n=15A175285
• Number of n X 7 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically.at n=4A207402
• Number of 5Xn 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically.at n=6A207405
• Number of tilings of a 9 X n rectangle using dominoes and right trominoes.at n=3A219992
• Smallest area A of Heron triangles with sides (a, b, c) in arithmetic progression of the form b - d(n), b, b + d(n), where d(n) = A091998(n) = 12*n +- 1.at n=39A229098
• Number of 5-cycles in the n X n king graph.at n=28A288919
• Number of odd chordless cycles in the n-Andrásfai graph.at n=12A301771
• a(n) = Trinomial(2*n+1, 4) = (1/6)*n*(2*n + 1)*(2*n^2 + 9*n + 1), n >= 0.at n=13A302709
• G.f. A(x) satisfies A(x) = Series_Reversion(x - x^4*A'(x)^3).at n=4A361310
• G.f. A(x) satisfies A(x) = 1/(1 - 9*x*A(x))^(2/3).at n=4A377267