27371

Appears in sequences

• Number of stacks, or arrangements of n pennies in contiguous rows, each touching 2 in row below.at n=35A001524
• a(n) = -a(n-1) - 2*a(n-2).at n=34A001607
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 25 ones.at n=14A031793
• a(n) is the smallest positive solution k to 24*k == 1 (mod 13^n).at n=3A052466
• a(n) is the unique odd positive solution x of 2^n = 7x^2+y^2.at n=33A077020
• Numbers k whose sum of digits equals the period of 1/k.at n=40A178495
• a(n) = (2*n^3 + 3*n^2 + n + 3)/3.at n=34A188475
• Numbers n such that 10^n - 1 divides 10^(10^100) - 10.at n=43A200879
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 43", based on the 5-celled von Neumann neighborhood.at n=34A269878
• a(n) is the number of distinct scalar products which can be formed by pairs of signed permutations (V, W) of [n].at n=34A358655