25226

Appears in sequences

• Expansion of 1/(x^5 - 2*x^4 + x^3 - 2*x^2 + x - 1).at n=39A129704
• Numbers n such that 1 + Sum{k=1..n/2} A001223(2k-1)*(-1)^k = 0.at n=18A130642
• Numbers n such that 1 - S(n) = 0, where S(n) = (S(n-1) + A000040(n))*(-1)^n; S(0)=0, n=>1.at n=23A131197
• T(n,k)=Number of nXk arrays containing k copies of 0..n-1 avoiding the pattern down-up in every row and column.at n=23A269505
• Number of 3Xn arrays containing n copies of 0..3-1 avoiding the pattern down-up in every row and column.at n=4A269507
• Number of 3 X n 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.at n=9A281717
• Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=5A306160
• Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=5A306164