199626

Appears in sequences

• Expansion of x/((1-x)^3*(1-x^2)^3*(1-x^3)).at n=33A164680
• Eight bishops and one elephant on a 3 X 3 chessboard. G.f.: (1 - x - x^2)/(1 - 3*x - x^2 + 6*x^3).at n=14A175654
• Number of compositions of n such that the number of parts is not divisible by the greatest part.at n=18A199884
• G.f. for Ehrhart quasi-polynomials for hyperplane arrangements of type E_6.at n=45A210634
• Numbers n for which there exists k < n such that A000203(k) = A000203(n) and A007947(k) = A007947(n), where A000203 gives the sum of divisors, and A007947 gives the squarefree kernel of n.at n=28A255335
• The least number k > A255334(n) for which A000203(k) = A000203(A255334(n)) and A007947(k) = A007947(A255334(n)), where A000203 gives the sum of divisors, and A007947 gives the squarefree kernel of n.at n=28A255423