40964

Appears in sequences

• Coefficients of Chebyshev polynomials.at n=18A005583
• Number of connected graphs with <= n edges.at n=11A046745
• a(n) = ceiling(a(n-1)*3/2) with a(1) = 1.at n=25A061419
• a(n) = (n-1)(n-4)(n-9)...(n-k^2) where k^2 < n <= (k+1)^2.at n=22A080500
• Values of register b when register a becomes 0 for the two register machine {i[1], i[1], i[1], d[2,1], d[1,6], i[2], d[1,5], d[2,3]}.at n=25A156623
• Number of (w,x,y,z) with all terms in {1,...,n} and w*x>y*z+1.at n=17A212054
• Number of length n+2 0..3 arrays with every three consecutive terms having the sum of some two elements equal to twice the third.at n=35A248428
• Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two sums of the central column and central row nondecreasing horizontally and vertically.at n=12A258521
• Fixed points of A065649, a permutation of nonnegative integers based on Champernowne's constant.at n=13A261279
• a(n) = (n^4 + 5*n^3 + 11*n^2 + 7*n)/6.at n=21A332697
• a(n) = (1/5) * Sum_{k=0..n-1} binomial(5*n,5*k+2).at n=4A387744
• Numbers k such that sigma(k) = psi(k) + phi(k).at n=15A389478