25175

Appears in sequences

• a(n) is the concatenation of n and 7n.at n=24A009441
• Numbers n such that x^n + x^12 + 1 is irreducible over GF(2).at n=13A057482
• Expansion of g.f.: 1/((1 - x - x^2 + x^6 - x^8)*(1 - x^2 + x^6 + x^7 - x^8)).at n=22A147620
• Expansion of (1-2x+6x^2-x^3)/(1-3x+x^2)^2.at n=8A167478
• Number of n-bead quaternary necklaces (no turning over allowed) that avoid the subsequence 110.at n=9A274019
• Number of nX5 0..1 arrays with every element unequal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=14A317738