26163

Appears in sequences

• a(n) = n^2*(n^2 - 1)/4.at n=18A006011
• a(n) = (1/4)*floor(n/2)*floor((n-1)/2)*floor((n-2)/2)*floor((n-3)/2).at n=38A028723
• Numerators of continued fraction convergents to sqrt(726).at n=5A042398
• Denominators of continued fraction convergents to sqrt(873).at n=12A042687
• Number of binary Lyndon words with an even number of 1's.at n=19A051841
• Number of 4-ary Lyndon words of length n with trace 0 mod 4.at n=9A054664
• Number of orbits of length n under the full 18-shift (whose periodic points are counted by A001027).at n=3A060221
• Expansion of 1/((1 - x^2)*(2 - c(x))), where c(x) is the g.f. of A000108.at n=9A106269
• Incorrect duplicate of A226508.at n=3A121515
• a(n) = (9/2)*(n-1)*(n-2)*(n-3).at n=19A134171
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, 0), (0, 1, 1), (1, 0, -1), (1, 0, 0)}.at n=8A150251
• Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1, 0), (0, -1), (0, 1), (1, -1), (1, 0)}.at n=8A151295
• G.f. is the polynomial (Product_{k=1..18} (1 - x^(3*k)))/(1-x)^18.at n=5A162638
• Super anti-abundant numbers.at n=26A192269
• Numbers such that floor(a(n)^2 / 6) is a square.at n=15A204518
• Number of nonnegative integer arrays of length n+11 with new values 0 upwards introduced in order, no three adjacent elements all unequal, and containing the value 6.at n=5A211846
• T(n,k)=Number of nonnegative integer arrays of length n+2k+1 with new values 0 upwards introduced in order, no three adjacent elements all unequal, and containing the value k+1.at n=50A211849
• Number of nonnegative integer arrays of length 2n+7 with new values 0 upwards introduced in order, no three adjacent elements all unequal, and containing the value n+1.at n=4A211852
• a(n) = Sum_{i=3^n..3^(n+1)-1} i.at n=4A226508
• Numbers x such that the sum of all their cyclic permutations is equal to that of all cyclic permutations of sigma(x) and all cyclic permutations of Euler totient function phi(x).at n=31A247317