2240512

Appears in sequences

• Expansion of 1/((1+4*x)*(1-12*x)).at n=6A053536
• a(n) = det M_n where M_n is the n X n matrix m(i,j) = prime(i+j); a(0) = 1 by convention.at n=9A071543
• Duplicate of A071543.at n=9A092417
• Number of walks of length n on one 60-degree wedge of the equilateral triangular lattice. The walk can go along the walls of the wedge, but cannot cross the walls.at n=10A129400
• Triangular sequence from coefficients of characteristic polynomial of n X n prime element matrices: M=A.B.A^(-1); (A(3) is singular): examples; A(4)= {{2, 3, 5, 7, 11}, {3, 5, 7, 11, 13}, {5, 7, 11, 13, 17}, {7, 11, 13, 17, 19}, {11, 13, 17, 19, 23}} B(4)= {{3, 5, 7, 11, 13}, {5, 7, 11, 13, 17}, {7, 11, 13, 17, 19}, {11, 13, 17, 19, 23}, {13, 17, 19, 23, 29}}.at n=41A137405
• 1/4 the number of (n+1) X 4 0..2 arrays with every 2 X 2 subblock having distinct edge sums.at n=14A209377