2737152

Appears in sequences

• a(n) = (2*n)!/core(n!)^2/(n+1) where core(x) is the squarefree part of x.at n=5A072118
• a(n) = n^6 - n^5.at n=12A085539
• Numbers whose set of base 12 digits is {0,B}, where B base 12 = 11 base 10.at n=32A097258
• Number of n-digit palindromes in base n.at n=10A099767
• Numbers of the form (11^i)*(12^j), with i, j >= 0.at n=26A108218
• Expansion of g.f. (1-x)/(1-12*x).at n=6A196731
• Numbers n such that n^k is the sum of a positive square and a positive cube for all k not divisible by 6.at n=8A274247
• a(n) = n/(Sum_{k=1..n} 1/phi(A341813(n)*k)).at n=35A341814