27264

Appears in sequences

• A triangular sequence of coefficients from a three level exponential expansion function: f(x,t) = log(1 + t)*(1 - t)*exp(x*(t - t^2)).at n=30A137455
• Numbers m with property that m-th triangular number is a sum of divisors of some k-th triangular number (A175849).at n=15A175850
• Numbers with prime signature {7,1,1}, i.e., of form p^7*q*r with p, q and r distinct primes.at n=37A179696
• (n-1)-st elementary symmetric function of the first n terms of the periodic sequence (4,1,2,3,4,1,2,3,...).at n=10A203164
• Numbers n such that the products n*(sum of the reciprocals of the Collatz (3x+1) sequence beginning at n) are integers.at n=38A225878
• Decimal representation of the n-th iteration of the "Rule 70" elementary cellular automaton starting with a single ON (black) cell.at n=7A266846
• Decimal representation of the n-th iteration of the "Rule 78" elementary cellular automaton starting with a single ON (black) cell.at n=7A266976
• Numbers n such that the decimal number concat(6,n) is a square.at n=36A273361
• Number of aperiodic necklaces (Lyndon words) with k<=8 black beads and n-k white beads.at n=22A277633
• 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 94", based on the 5-celled von Neumann neighborhood.at n=14A278821
• a(n) = (1/4)*A291038(n).at n=11A291039
• Harary index for the n-Keller graph.at n=3A296189
• Number of subsets of {1...n} containing no element > 1 whose prime indices all belong to the subset.at n=18A324738
• Number of partitions of n into 8 or more distinct parts.at n=45A347575