-240

Appears in sequences

• Expansion of reciprocal of theta series of E_8 lattice.at n=1A001943
• Generalized sum of divisors function.at n=18A002130
• q-expansion of modular form of weight 13/2: eta(8 tau)^12 * theta(tau).at n=68A002284
• Low temperature energy function for square lattice.at n=5A002909
• Coefficients of Jacobi cusp form of index 1 and weight 10.at n=15A003784
• Expansion of 6-dimensional cusp form (eta(q) * eta(q^3))^6 in powers of q.at n=35A007332
• Triangle of Lah numbers.at n=11A008297
• Triangle T(n,k) of arctangent numbers: expansion of arctan(x)^n/n!.at n=28A008309
• Expansion of e.g.f. cos(x*tan(x)), even terms only.at n=3A009080
• Expansion of e.g.f. cosh(sin(x)^2) (even coefficients).at n=3A009150
• Expansion of log(1+tanh(log(1+x))).at n=6A009383
• Expansion of tanh(x)*cosh(log(1+x)).at n=6A009827
• Expansion of e.g.f. sec(sin(x)*sin(x)), even powers only.at n=3A012302
• cos(arcsin(x)*arcsin(x))=1-12/4!*x^4-240/6!*x^6-7728/8!*x^8...at n=3A012344
• sech(arcsin(x)*arcsin(x))=1-12/4!*x^4-240/6!*x^6-1008/8!*x^8...at n=3A012351
• cos(sinh(x)*arcsin(x))=1-12/4!*x^4-240/6!*x^6-5040/8!*x^8...at n=3A012538
• sech(sinh(x)*arcsin(x))=1-12/4!*x^4-240/6!*x^6+1680/8!*x^8...at n=3A012544
• exp(arcsinh(x)*arcsinh(x))=1+2/2!*x^2+4/4!*x^4+8/6!*x^6-240/8!*x^8...at n=4A012648
• Expansion of the modular form of level 4 and weight 1/2.at n=4A013953
• a(n) = 2^n-n^4.at n=4A024014