20077

Appears in sequences

• Minimal consecutive determinant (negated) of n X n persymmetric matrix with entries {-1,0,+1}.at n=9A034919
• Integers k such that the k-th triangular number t_k has all its base-12 digits contained in {1,5,7,11}.at n=8A118711
• Positive numbers y such that y^2 is of the form x^2 + (x+97)^2 with integer x.at n=11A157469
• Number of (n+2) X 4 binary arrays with each 3 X 3 subblock having rows and columns in lexicographically nondecreasing order.at n=19A184541
• a(n) = A188493(n+1) - A188491(n) - A188495(n).at n=11A188497
• Numbers k such that 7*10^k + 69 is prime.at n=19A294484