-2015

Appears in sequences

• Triangle, read by rows, where the n-th row lists the (2*n+1) coefficients of (1 + x - 3*x^2)^n.at n=56A084614
• Expansion of 1/sqrt(1 - 2x + 13x^2).at n=7A098333
• Row sums of number triangle related to the Jacobsthal numbers.at n=32A110325
• Triangle T(n,k), n>=1, 0<=k<=n^2, read by rows: row n gives the coefficients of the chromatic polynomial of the square grid graph G_(n,n), highest powers first.at n=20A182368
• First differences of A067046.at n=28A291681
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of 1/sqrt(1 - 2*x + (1+4*k)*x^2).at n=62A307860
• First term of n-th difference sequence of (floor(k*r)), r = sqrt(5), k >= 0.at n=13A325668