3342336

Appears in sequences

• One quarter of fourth unsigned column of Lanczos' triangle A053125.at n=7A054329
• Expansion of (1+3*x+4*x^2)/(1-4*x^2+4*x^4).at n=33A058582
• Products of exactly 18 primes (generalization of semiprimes).at n=28A069279
• Numbers k such that phi(k) is a perfect tenth power.at n=29A078170
• a(n) = 2^(n-3)*(n+2)*(n+3)*(n+4)/3.at n=14A080930
• Number of ternary Lyndon words with exactly three 1's.at n=15A124721
• Triangle: r=23;l=7;m(r,l,n)=(r - l)*IdentityMatrix[n] + l*Table[1, {i, 1, n}, {j, 1, n}].at n=15A157981
• Expansion of (1-x+4*x^2)/(1-2*x)^2.at n=17A167667
• Expansion of x^4*(1 - x)^2*(1 - 3*x^2 - 2*x^3 + x^4 - x^5)/(1 - 2*x)^3.at n=22A192886
• (n-1)-st elementary symmetric function of the first n terms of (1,2,1,2,1,2,1,2,1,2,...)=A000034.at n=33A203150
• Number of n X 2 0..2 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once.at n=8A268898