18766

Appears in sequences

• Numbers k such that 33*2^k+1 is prime.at n=28A032366
• Expansion of sum ( q^n / product( 1-q^k, k=1..6*n), n=0..inf ).at n=30A035298
• Number of positive integers <= 2^n of form 2 x^2 + 7 y^2.at n=17A054157
• Number of rooted trees with n points and exactly k specified colors: C(n,k), 1<=n, 1<=k<=n.at n=29A141610
• Partial sums of A048995.at n=52A174514
• a(n) = prime(n)^2-3.at n=32A182200
• Sum of column entries of the table with rows of prime numbers (2,3,0,0,...), (0,5,7,11,0,...), (0,0,13,17,19,23,0,...), (0,0,0,29,31,37,41,43,0,...), ...at n=25A238760
• Expansion of Product_{k>=1} 1/(1-x^(3*k-2))^k.at n=43A262877
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 510", based on the 5-celled von Neumann neighborhood.at n=39A272700
• Twice-partitioned numbers where the first partition is constant.at n=25A279787
• a(n) = [x^n] Product_{k>=1} 1/(1 - x^prime(k))^n.at n=11A301971
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=37A302265
• Number of 2Xn 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=7A302266
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=37A302808
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=37A302965
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=37A303469
• Number of rooted trees with n nodes colored using exactly 2 colors.at n=7A339642
• Lesser of 2 successive sphenic numbers (k, k+4) sandwiching 3 consecutive nonsquarefree numbers.at n=25A363830