378570

Appears in sequences

• Numbers k such that k-1, k+1, k^2+1 and k^4+1 are all prime numbers.at n=23A070156
• Number of (n+1) X (4+1) 0..1 arrays with the sum of each 2 X 2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise.at n=3A235552
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise.at n=24A235555