21531

Appears in sequences

• Numbers n such that Maple 9.5, Maple 10, Maple 11 and Maple 12 give the wrong answers for the number of partitions of n.at n=18A110375
• Number of partitions of n such that 2*(greatest part) < (number of parts).at n=47A237751
• Least positive integer k such that both k and k*n belong to the set {m>0: 2*prime(prime(m))+1 = prime(p) for some prime p}.at n=1A261362
• Positive integers x such that x^3 - 1 = y^4 + z^2 for some positive integers y and z.at n=8A266215
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 537", based on the 5-celled von Neumann neighborhood.at n=17A282978
• p-INVERT of (1,0,0,1,0,0,1,0,0,...), where p(S) = 1 - S - S^3.at n=18A292320
• a(n) is the number of vertices formed by n-secting the angles of a decagon.at n=33A335801