-344

Appears in sequences

• Expansion of 1 / Sum_{n=-oo..oo} x^(n^2).at n=11A004402
• Expansion of sin(sinh(tan(x))).at n=3A009489
• Numerator of [x^n] of the Taylor series arccosh(exp(x) - arcsin(x)).at n=7A013306
• Discriminants of quadratic number fields Q(sqrt -n) for n squarefree.at n=53A033197
• 10th differences of primes.at n=1A036271
• Product_{k>=1} (1 + x^k)^a(k) = 1 + 2x.at n=11A038067
• Dirichlet inverse of sigma_3 function (A001158).at n=6A053825
• Expansion of square of continued fraction 1/ ( 1+q/ ( 1+q^2/ ( 1+q^3/ ( 1+q^4/... )))).at n=49A055101
• Image of Euler totient function (A000010) under "little Hankel" transform that sends [c_0, c_1, ...] to [d_0, d_1, ...] where d_n = c_n^2 - c_{n+1}*c_{n-1}.at n=30A056228
• Ooguri-Vafa invariants of disk degeneracies for brane I or brane II in the O(K) -> P^2 geometry.at n=6A061629
• Alternating sum sigma(1)-sigma(2)+sigma(3)-sigma(4)+...+((-1)^(n+1))*sigma(n).at n=39A068762
• Triangle of coefficients of powers of e^2 in numerators of Sum_{k>=1} {1 / (1 + k^2*Pi^2)^n}.at n=10A085470
• Riordan array (1/(1+x), x*(1-2*x)/(1+x)^2).at n=24A110522
• McKay-Thompson series of class 12B for the Monster group.at n=21A112148
• a(0) = 121; for n>0, a(n) = a(n-1) - n + 1.at n=31A137517
• a(n) = A140944(n+1) - 3*A140944(n).at n=39A140950
• L.g.f.: Sum_{n>=1} a(n)*x^n/n = log( Sum_{n>=0} x^(2^n-1) ).at n=13A162415
• Riordan array (1-x, x(1-x)/(1+x)).at n=58A186827
• McKay-Thompson series of class 12B for the Monster group with a(0) = 5.at n=21A187146
• McKay-Thompson series of class 12B for the Monster group with a(0) = -4.at n=21A187147