18408

Appears in sequences

• Number of ways to place 2 nonattacking kings on an n X n board.at n=14A061995
• Numbers k such that numerator of Bernoulli(2k) is divisible by the square of 59, the second irregular prime.at n=26A093058
• a(n) = (1/2)*(n^4 + 11*n^3 + 53*n^2 + 97*n + 54).at n=12A129026
• Odd-indexed terms of A129026.at n=6A129027
• Coefficients of expansion of:p(t,y)=-Exp[t/4]/(-2 + y*Exp[t/4] + y*Exp[3*t/4]).at n=30A171770
• Wiener index of the n-web graph.at n=23A180576
• Number of ways to place n nonattacking composite pieces queen + rider[1,5] on an n X n chessboard.at n=14A189875
• Number of nX4 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.at n=6A224154
• T(n,k)=Number of nXk 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.at n=51A224158
• Number of 7Xn 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.at n=3A224163
• Partial sums of A253089.at n=30A255601
• Number of non-equivalent ways under symmetry in one axis that 2 non-attacking kings of different colors can be placed on an n X n board.at n=13A357740