-626

Appears in sequences

• Expansion of Product_{m >= 1} (1 + q^m)^(-2).at n=33A022597
• Dirichlet inverse of sigma_4 function (A001159).at n=4A053826
• Numerator of Hermite(n, 8/21).at n=2A159745
• Numerator of Hermite(n, 18/31).at n=2A160316
• a(n) = (-11*n^5 + 145*n^4 - 635*n^3 + 1115*n^2 - 494*n + 120)/120.at n=9A161706
• a(n) = Sum_{k=0..n} k^p*q^k, where p=1, q=-2.at n=7A232600
• Expansion of q * phi(-q^2) * psi(q^9) / (f(q^3) * phi(q^3)) in powers of q where f(), phi(), psi() are Ramanujan theta functions.at n=26A233670
• Expansion of psi(q) * phi(-q^18) * f(-q^6) / f(q^3)^3 in powers of q where phi(), psi(), f() are Ramanujan theta functions.at n=27A233672
• Expansion of (1 - 2*x^2)/(1 + x)^3. Second column of Riordan triangle A248156.at n=38A248158
• a(n) = nearest integer to n^2 * sin(sqrt(n)).at n=26A274088
• Take alternate terms of A274088 and A274090.at n=52A274091
• Square array T(n,k), n >= 1, k >= 0, read by antidiagonals downwards, where T(n,k) = Sum_{d|n} mu(d)*mu(n/d)*d^k.at n=40A347227
• T(j,k) are the numerators u in the representation R = s/t + (2/Pi)*u/v of the resistance between two nodes separated by the distance vector (j,k) in an infinite square lattice of one-ohm resistors, where T(j,k), j >= 0, 0 <= k <= j, is a triangle read by rows.at n=25A355566
• Expansion of Sum_{k>0} x^(2*k)/(1+x^k)^3.at n=34A363022