42295

Appears in sequences

• Numbers n such that 3*10^n-7 is prime.at n=18A102964
• Binomial transform of a fractal structured sequence.at n=14A106496
• Half the number of n X n binary matrices, symmetric about the diagonal and under 90-degree rotation, having equal row sums.at n=13A140879
• Half the number of symmetric n X n binary matrices having equal row sums.at n=6A140988
• Number of nX3 -2..2 arrays of 2X2 subblock diagonal sums minus antidiagonal sums for some (n+1)X4 binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=5A227057
• T(n,k)=Number of nXk -2..2 arrays of 2X2 subblock diagonal sums minus antidiagonal sums for some (n+1)X(k+1) binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=30A227060
• T(n,k)=Number of nXk -2..2 arrays of 2X2 subblock diagonal sums minus antidiagonal sums for some (n+1)X(k+1) binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=33A227060