108609

Appears in sequences

• Expansion of 1/(1+x+2*x^2-2*x^3).at n=21A077977
• Triangle T, read by rows, such that column k equals column 0 of T^(k+1), where column 0 of T allows the n-th row sums to be zero for n>0 and where T^k is the k-th power of T as a lower triangular matrix.at n=55A101897
• Column 0 of triangular matrix A101897, in which column k equals column 0 of A101897^(k+1) and where the n-th row sums are zero for n>0.at n=10A101900
• Number of nX5 1..3 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nondecreasing order.at n=5A166809
• Number of nX6 1..3 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nondecreasing order.at n=4A166811
• Numbers k such that 10^k * (10^k - 1) - 1 is prime.at n=11A265383