-257

Appears in sequences

• Derivative of log of A007360.at n=25A023892
• a(n) = prime(n)-n*tau(n) where tau(n) is the number of divisors of n.at n=47A067292
• Alternating sum of diagonals in A060177.at n=39A104575
• Expansion of g.f. 1/Sum_{k>=0} k!*(k!+1)*x^k/2.at n=4A114039
• Semiprime(n)*semiprime(n+3) - semiprime(n+1)*semiprime(n+2), where semiprime(n) is the n-th semiprime.at n=34A118780
• a(n) = A135574(n+1) - 2*A135574(n).at n=8A135575
• a(0) = 121; for n>0, a(n) = a(n-1) - n + 1.at n=28A137517
• A triangle of polynomial coefficients: p(x,n)=-(ChebyshevU[n, x] - ((x + 1)^n - (1 - x)^n)); sp(x,n) = p(x, n) + x^n*p(1/x, n).at n=34A155994
• A triangle of polynomial coefficients: p(x,n)=-(ChebyshevU[n, x] - ((x + 1)^n - (1 - x)^n)); sp(x,n) = p(x, n) + x^n*p(1/x, n).at n=42A155994
• Numerator of Hermite(n, 9/26).at n=2A160073
• Numerators of an asymptotic series for the Gamma function (G. Nemes).at n=4A182912
• a(n) = -prime(n) if prime(n) is an irregular prime else prime(n).at n=54A226159
• Triangle T(n,k), read by rows: T(n,k) is the numerator of (1+2^(n-k+1))/(1-2^(k+1)).at n=28A228146
• Triangle T(n,k), read by rows: T(n,k) is the numerator of (1+2^(n-k+1))/(1-2^(k+1)).at n=37A228146
• Triangle T(n,k), read by rows: T(n,k) is the numerator of (1+2^(n-k+1))/(1-2^(k+1)).at n=47A228146
• Expansion of (1 + x - x^2)/((1 + x)*(1 + 2*x)).at n=9A248155
• Triangle read by rows: T(n,k) is the coefficient A_k in the transformation Sum_{k=0..n} x^k = Sum_{k=0..n} A_k*(x-3*(-1)^k)^k.at n=18A249269
• a(n) = 8*n^3 - 449*n^2 + 7967*n - 45523.at n=13A253045
• Coefficient of x in minimal polynomial of the continued fraction [1^n,2,1,1,1,...], where 1^n means n ones.at n=5A265762
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 334", based on the 5-celled von Neumann neighborhood.at n=34A271284