40066

Appears in sequences

• Numbers k such that k^2 is composed of three 1-digit-overlapping subsquares.at n=13A048426
• a(n) = sigma[k](n) - phi(n)^k - d(n)^k for k=3.at n=33A079539
• Number of (n+1) X 2 0..2 arrays with every 2 X 2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor.at n=20A207142
• Number of permutations of {1..n} with fewer than 5 interior elements having values lying between the values of their neighbors.at n=8A226438
• Expansion of 1/sqrt(1 - 4*x/(1-x)^5).at n=6A359758