51073

Appears in sequences

• Number of (n+1) X 3 0..1 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) nondecreasing in column and row directions, respectively.at n=36A204645
• Expansion of -(4*x^3+8*x^2+4*x+1)/(2*x^4+4*x^3+2*x^2-x-1).at n=18A270307
• Numbers k such that (k - digitsum(k))(k + digitsum(k)) contains k as a substring.at n=14A334249
• Semiprimes k such that k+4, k+6, k+9, k+10 and k+14 are also semiprimes.at n=14A360666
• Numbers k such that k + 4, k + 6, k + 9, k + 10, and k + 14 are all semiprimes, where 4, 6, 9, 10, 14 are the first 5 semiprimes.at n=36A365240