24470

Appears in sequences

• Number of 2's in n-th term of A022482.at n=37A022485
• Numbers k such that x^k + x^9 + 1 is irreducible over GF(2).at n=47A057479
• Triangle of numbers {a(n,k), n >= 0, 0<=k<=n} defined by a(0,0)=1, a(1,0)=2, a(n,0)=A006318(n), a(n,n)=A006319(n), a(n+1,0)=a(n,0)+a(n,n), a(n,m+1)= Sum A006318(k)*a(n-k,0), k=0..m.at n=34A073150
• Number of permutations of length n which avoid the patterns 123, 3241.at n=13A116702
• Number of nX1 0..1 arrays with no 1 equal to more than one of its king-move neighbors, with the exception of exactly two elements.at n=16A282831
• Number of 3Xn 0..1 arrays with every element equal to 0, 1, 2 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=11A302416
• The Riordan square of the large Schröder numbers, triangle read by rows, T(n, k) for 0 <= k <= n.at n=29A321623
• a(n) = Sum_{k=0..n} (-5)^(n-k) * binomial(n-1,n-k) * binomial(2*k,k).at n=9A360322