-27648

Appears in sequences

• arctan(arcsin(x)*arcsin(x))=2/2!*x^2+8/4!*x^4-112/6!*x^6-8832/8!*x^8...at n=4A012343
• Determinant of the n X n matrix whose element (i,j) equals |i-j| (mod 4).at n=11A071769
• Coefficient triangle of permutation-based polynomials: p(x,n)=Product[x - n!/(n - i)!, {i, 0, n}].at n=15A158451
• Triangle read by rows: coefficients T(n,k) of a binomial decomposition of 1 as Sum_{k=0..n} T(n,k)*binomial(n,k).at n=49A244116
• Expansion of 1/Sum_{k>=0} A000326(k+1)*x^k.at n=13A296775
• Triangle read by rows. Row n gives the coefficients of Product_{k=0..n} (x - k^k) expanded in decreasing powers of x, with row 0 = {1}.at n=20A349226
• Product_{n>=1} (1 + a(n)*x^n/n!) = 1 + arctan(x).at n=8A353820
• Product_{n>=1} 1 / (1 - a(n)*x^n/n!) = 1 + arctan(x).at n=8A353915