21562

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 75.at n=20A020414
• Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 4 ones in any 4 X 4 X 4 subtriangle.at n=14A153934
• Triangle t(n,m) = 2*A022166(n,m)-binomial(n,m), read by rows, 0<=m<=n.at n=38A174526
• Triangle t(n,m) = 2*A022166(n,m)-binomial(n,m), read by rows, 0<=m<=n.at n=42A174526
• Coefficient of x in the reduction by x^2 -> x+1 of the polynomial p(n,x) defined at Comments.at n=16A192961
• Number of 8-length words w over n-ary alphabet such that for every prefix z of w we have #(z,a_i) = 0 or #(z,a_i) >= #(z,a_j) for all j>i and #(z,a_i) counts the occurrences of the i-th letter in z.at n=5A213287
• Number of n-length words w over 5-ary alphabet such that for every prefix z of w we have #(z,a_i) = 0 or #(z,a_i) >= #(z,a_j) for all j>i and #(z,a_i) counts the occurrences of the i-th letter in z.at n=8A213293
• Number of multisets of nonempty words with a total of n letters over binary alphabet such that all letters occur at least once in the multiset.at n=10A261043