274432

Appears in sequences

• a(n) = T(n,2), array T as in A049600.at n=14A049611
• a(n) = 2^n*(binomial(n,2) + 1).at n=12A052481
• Binomial transform of binomial(n+2,2).at n=13A084851
• Expansion of g.f.: A(x) = ( Sum_{n>=0} (2*n+1)*8^n*x^(n*(n+1)/2) )^(1/3).at n=5A111984
• Numbers with 26 divisors.at n=17A137489
• 1/12 of the number of permutations of 3 indistinguishable copies of 1..n with exactly 2 local maxima.at n=5A152499
• Integer quotients of k^2 by the sum of the prime distinct divisors of k^2+1, where k = A196219(n).at n=17A196220
• Number of (n+2)X(5+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=28A253838
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 57", based on the 5-celled von Neumann neighborhood.at n=18A278662
• Numbers n for which A019565(n) <= A087207(n) < n.at n=30A286612