-1372

Appears in sequences

• Magnetic susceptibility coefficients for square lattice spin 1 Ising model.at n=10A010115
• Riordan array (1/(1+x), x(1-x)/(1+x)^2).at n=39A110511
• Expansion of phi(-x) / f(-x^4)^2 in powers of x where phi(), f() are Ramanujan theta functions.at n=41A137830
• A triangular sequence of the expansion of: (1-Prime[n])^n: t(n,m)=(-1)^m*Prime[n]^(n - m)*Binomial[n, m]; with Prime[0]=1 defined to extend and lower the results.at n=11A141028
• First differences of A154570.at n=13A156591
• A coefficients of characteristic polynomials of A_n Cartan matrices times their transposes: t(n,m,d)=If[ n == m, 2, If[n == m - 1 || n == m + 1, -1, 0]]. M(d)=t(n,m,d)*Transpose[t(n,m,d)].at n=22A158199
• Row sums of triangle A164658 (numerators of coefficients from Integral_{x} T(n,x), with T(n,x) Chebyshev polynomials of the first kind).at n=11A164662
• Totally multiplicative sequence with a(p) = 7*(p-3) for prime p.at n=49A167317
• For any composite number n with more than a single prime factor, take the polynomial defined by the product of the terms (x-pi)^ei, where pi are the prime factors of n with multiplicities ei. Integrate this polynomial from the minimum to the maximum value of pi. This sequence lists the values of the integrals that are integer.at n=26A245435
• The logarithmic transform of sigma(n).at n=6A274805
• Irregular triangle read by rows of normalized Girard-Waring formula (cf. A210258), for m=8 data values.at n=41A288188
• a(1) = 1, a(2) = 3; a(n) = n^2 * Sum_{d|n, d < n} (-1)^(n/d) a(d) / d^2.at n=27A361986
• G.f. A(x) satisfies: A(x) = x - x^2 * exp(A(x) + A(x^2)/2 + A(x^3)/3 + A(x^4)/4 + ...).at n=26A363062