62128

Appears in sequences

• Numbers that are the sum of 11 positive 10th powers.at n=15A004811
• a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n+1-k), where k = [ (n+1)/2 ], s = (1, p(1), p(2), ...).at n=40A024479
• Number of different values obtained by evaluating all different parenthesizations of 1/2/3/4/.../n.at n=21A078389
• Positions of A080313 in A014486.at n=28A080312
• a(n) = n*(n+1)*(11*n+1)/6.at n=32A132112
• Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 4,3 4,4 5,3 5,4 polyhexes in any orientation on a planar nXnXn triangular grid.at n=8A155424
• Primitive numbers in A229307.at n=33A229311
• First row of spectral array W(gamma+1).at n=22A250253
• Numbers k such that the symmetric representation of sigma(k) has only two parts and they meet at the center of the Dyck path.at n=18A262259
• a(n) = A000217(A000217(n)+1).at n=26A267707
• Number of nondirected diagonally convex polyominoes with perimeter 2n + 2.at n=8A269228
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 437", based on the 5-celled von Neumann neighborhood.at n=7A272154
• Number of permutations of [n] such that for each cycle c the smallest integer interval containing all elements of c has at most four elements.at n=12A276838
• Number of n X 6 0..1 arrays with every element unequal to 0, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.at n=8A304950
• a(n) is the smallest number of the form 2^k * p * (2^(k+1) * p + 1) where 2 < p < 2^(k+1) is the n-th prime and 2^(k+1) * p + 1 is prime, or -1 if no such number exists.at n=3A370209