256256

Appears in sequences

• a(n) = (n+1)^2*binomial(2*n+2,n-1)/2.at n=7A049070
• One half of sixth unsigned column of Lanczos' triangle A053125.at n=4A054330
• a(n) = 2^(n-4)*(n+2)*(n+3)*(n+4)*(n+5)*(n+6)/15.at n=8A080952
• a(n) is the least integer of the form (n-2)(n-4)...(n-2k)/n. 0 if no such number exists.at n=29A109898
• a(n) = binomial(n+3,4)*4^4.at n=10A120054
• a(n) = denominator of Product_{k=1..n} (1 + {n/k}), where {x} is the fractional part of x, {x} = x - floor(x).at n=14A128779
• a(n) = binomial(n+10, 10)*4^n.at n=4A172978
• a(n) = 2^n concatenated with itself.at n=8A178664
• a(n) = concatenation of n^2 with itself.at n=15A253445
• a(n) = 2*n*A259319(n) - A259110(n)^2.at n=5A259320
• E.g.f. (1/5!)*sin^5(x)/cos(x) (coefficients of odd powers only).at n=6A278194
• Triangular array read by rows. Let P be the poset of all even sized subsets of [2n] ordered by inclusion. T(n,k) is the number of intervals in P with length k, 0<=k<=n, n>=0.at n=41A328821
• Maximum number of copies of a 123456 permutation pattern in an alternating (or zig-zag) permutation of length n + 9.at n=19A339356
• Positions of records in A116489.at n=36A342868