80515

Appears in sequences

• Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 4 6 or 7.at n=9A252517
• Expansion of (x^4+x^3+x^2-x-1)/(x^4+2*x^3+2*x^2+x-1).at n=14A272642
• Numbers that are the sum of six fourth powers in seven or more ways.at n=22A345564
• Numbers that are the sum of six fourth powers in exactly seven ways.at n=20A345819