-1443

Appears in sequences

• Determinant of the n X n tridiagonal matrix M with the elements on the diagonals equal to 1, except M(n,n-1)=M(n-1,n)=n.at n=36A080322
• Number of partitions of n with even crank minus number of partitions of n with odd crank.at n=61A124226
• See Mathematica program.at n=50A130605
• a(n) = (-1)^n*n*(n-2).at n=38A131386
• Riordan array ((1+x^2)/(1-x)^2, -x/(1-x)^2).at n=50A136672
• a(n) = A000045(n) - A113405(n).at n=14A140096
• Expansion of (1-5*x-x^2+x^3)/((1+x)*(1-x)^3).at n=37A141354
• The n-th term of the n-th Dirichlet self-convolution equals n^2.at n=38A163591
• Triangle read by rows interpolating the swinging subfactorial (A163650) with the swinging factorial (A056040).at n=37A163770
• Values of n such that L(17) and N(17) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.at n=10A227520
• a(n) = 1 - n^2.at n=38A258837
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 49", based on the 5-celled von Neumann neighborhood.at n=21A270017