-1224
domain: Z
Appears in sequences
- arcsinh(arcsin(arctan(x)))=x-2/3!*x^3+32/5!*x^5-1224/7!*x^7+89984/9!*x^9...at n=3A012093
- McKay-Thompson series of class 24f for Monster.at n=33A058589
- a(n) = (n+1)*(2-n)/2.at n=50A080956
- Row sums of number triangle related to the Jacobsthal numbers.at n=25A110325
- Sequence is {a(3,n)}, where a(m,n) is defined at sequence A110665.at n=48A110668
- a(n) = -a(n-1) + 7*a(n-2) + 3*a(n-3) with a(0) = a(1) = 0, a(2) = 1.at n=9A137232
- a(n) = 2n(19-n).at n=36A182428
- Expansion of (1+4*x+x^2) / ((1-x)^3*(1+x)^4).at n=30A229834
- a(n) = 1 - n^2.at n=35A258837
- First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 443", based on the 5-celled von Neumann neighborhood.at n=23A272228
- Triangle read by rows, e.g.f. exp(x*z)*(2*(exp(z)+1)/(cosh(z)+cos(z))-1).at n=47A281587
- Expansion of r(q^2) / r(q)^2 in powers of q where r() is the Rogers-Ramanujan continued fraction.at n=44A285348
- Expansion of Sum_{k>0} k * x^k/(1 + x^k)^3.at n=35A364343