26184

Appears in sequences

• a(n) = floor(X/Y) where X = concatenation in decreasing order of (2n)-th even number to (n+1)-th even number and Y = that of first n even numbers in increasing order.at n=15A067092
• G.f.: Product((1+x^i)/(1-x^i),i=1..n-1)/(1-x^n), with n = 5.at n=44A091773
• Number of (n+1) X (2+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=9A258548
• 10th-power analog of Keith numbers.at n=11A281921
• Growth series for group with presentation < S, T : S^2 = T^3 = (S*T)^10 = 1 >.at n=29A298812
• Number of n X n 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=6A303308
• Number of nX7 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=6A303313
• Number of 7Xn 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=6A303319
• a(n) = n^4 + 3*n^3 + 2*n^2 - 2*n.at n=12A330651
• Expansion of (1+x) / (1-2*x-4*x^2+2*x^3).at n=9A384678