39424

Appears in sequences

• a(n) = n*(n+3)*2^(n-3).at n=10A001793
• Coefficients of Chebyshev polynomials: n*(2*n-3)*2^(2*n-5).at n=5A002698
• Norm of a matrix.at n=7A004141
• a(n) = 10*n^3 - 6*n^2.at n=16A006592
• Droll numbers: numbers > 1 whose sum of even prime factors equals the sum of odd prime factors.at n=12A019507
• Triangle read by rows: T(n,k) = number of peakless Motzkin paths of length n containing k UHH...HD's, where U=(1,1), D=(1,-1) and H=(1,0) (can be easily expressed using RNA secondary structure terminology).at n=53A089741
• Triangle read by rows: T(n,k) is the number of Motzkin paths of length n having k high humps. (A hump is an upstep followed by 0 or more flatsteps followed by a downstep. A high hump is a hump that starts at a level higher than zero.).at n=45A097888
• Triangle read by rows: T(n,k) is number of paths from (0,0) to (3n,0) that stay in the first quadrant (but may touch the horizontal axis), consisting of steps u=(2,1),U=(1,2), or d=(1,-1) and have k returns to the x-axis.at n=42A108435
• Triangle read by rows: T(n,k) is the number of hill-free Dyck paths of semilength n, having k ascents of length at least 2 (1 <= k <= floor(n/2), n >= 2).at n=32A114593
• Coefficient table for Chebyshev polynomials T(2*n,x) (increasing even powers x, without zeros).at n=33A127674
• a(n) = 2*a(n-2) + 4*a(n-3), with initial terms 0, 1, 1.at n=17A134136
• A triangular sequence of coefficients of even plus odd Chebyshev polynomials, A053120: q(x,n) = T(x,2*n-1)+T(x,2*n).at n=60A137307
• Triangle read by rows: the coefficients of the Mittag-Leffler polynomials.at n=40A137513
• Sizes of successive increasing gaps between 2-pseudoprimes.at n=19A175738
• Triangular array: the fusion of polynomial sequences P and Q given by p(n,x)=(2x+1)^n and q(n,x)=(x+2)^n.at n=41A193734
• Mirror of the triangle A193734.at n=39A193735
• Denominator of A010786(n+1) / A010786(n).at n=43A208450
• Numbers whose Schwarzian arithmetic derivative is an integer.at n=36A209872
• Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k L-shaped corners (n>=2, k>=0).at n=43A273717
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 214", based on the 5-celled von Neumann neighborhood.at n=18A286737