66576

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 43.at n=5A031721
• Numbers k such that 115*2^k+1 is prime.at n=17A032407
• Base-4 digits are, in order, the first n terms of the periodic sequence with initial period 1,0,0.at n=8A033140
• Number of alternating polynomials of degree 3n in GF(2)[X], n>0.at n=20A165912
• Base-2 digits are, in order, the first n terms of the periodic sequence with initial period 1,0,0,0,0,0.at n=16A195904
• Number T(n,k) of permutations p of [n] such that the up-down signature of 0,p has nonnegative partial sums with a maximal value of k; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=47A258829
• Column 2 of triangle A258829.at n=7A259213
• Sum of products of n-bit numbers with their n-bit reverse.at n=6A327961
• a(n) = n^2*sigma_6(n).at n=4A386777