277134

Appears in sequences

• a(n) = 3*binomial(2n-1,n).at n=9A003409
• Central elements of the (1,2)-Pascal triangle A029635.at n=10A029651
• a(0) = 1; for n > 0, a(n) = binomial(n, floor(n/2)) + binomial(n-1, floor(n/2)).at n=20A050168
• Partial sums of A050494.at n=12A053367
• 1/512 of 11th unsigned column of triangle A053120 (T-Chebyshev, rising powers, zeros omitted).at n=10A054334
• Successive maxima in sequence A007365.at n=35A065933
• Diagonal of A083486.at n=11A083485
• Denominators of odd terms in the probability of obtaining an acute triangle by picking n points at random in the unit n-ball.at n=2A093757
• Ninth column (m=8) of (1,4)-Pascal triangle A095666.at n=12A095671
• Number triangle T(n,k) = lcm(1,..,2*n+2)/lcm(1,..,2*k+2).at n=48A120105
• Denominator of the polynomial A_l(x) = Sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=10.at n=9A145629
• Number of nX1 0..2 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.at n=28A200770
• Sequence of coefficients of x^1 in marked mesh pattern generating function Q_{n,132}^(0,4,0,0)(x).at n=32A212347
• Products of primes the squares of which are Fermi-Dirac divisors of n!at n=38A240505
• Products of primes the squares of which are Fermi-Dirac divisors of n!at n=39A240505
• Products of primes the squares of which are Fermi-Dirac divisors of n!at n=40A240505
• a(n) is the smallest k>1 such that d(n,k)^2 = d(n^2,k^2), where d(n,k) is the n-th divisor of a number k, for n>1; and a(1) = 1.at n=6A286527
• a(n) = (20*n)!*(3*n)!*(2*n)!/((10*n)!*(8*n)!*(6*n)!*n!).at n=1A295472
• a(1) = 1 and for any n > 1, if A330647(n) divides a(n-1) then a(n) = a(n-1) / A330647(n), otherwise a(n) = a(n-1) * A330647(n).at n=15A330648
• Numbers k such that 2520*k is a highly composite number.at n=47A352318