26256

Appears in sequences

• sin(sec(x)*arctan(x))=x+20/5!*x^5-784/7!*x^7+26256/9!*x^9...at n=4A012802
• Expansion of e.g.f.: exp(sech(x)*arctanh(x))=1+x+1/2!*x^2-3/4!*x^4+20/5!*x^5+165/6!*x^6...at n=9A012882
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 27.at n=5A031705
• n-th central term of triangle A118032 divided by n+1 for n>=0, where the matrix square of A118032 forms a diagonal bisection of A118032.at n=14A118039
• Triangle read by rows: T(n,k) is the number of ternary sequences of length n containing k subsequences 000 (consecutively; n,k>=0).at n=48A119825
• Number of ternary words of length n with exactly one 000.at n=11A119827
• a(n) = 729*n^2 + 2*n.at n=5A158396
• Number of cyclic arrangements of S={1,2,...,2n} such that the binary expansions of any two neighbors differ by one bit.at n=11A242530
• Number of length n 0..7 arrays with each partial sum starting from the beginning no more than sqrt(3) standard deviations from its mean.at n=4A244939
• Number of length 5 0..n arrays with each partial sum starting from the beginning no more than sqrt(3) standard deviations from its mean.at n=6A244944
• Sum of the second largest parts of the partitions of n into 10 parts.at n=40A326597
• Expansion of Sum_{k>=1} (-1 + Product_{j>=2} 1 / (1 - x^(k*j))).at n=48A329435
• Lower (1/5,1/2) midsequence of (2^n) and (5*n); see Comments.at n=17A390561