40144896

Appears in sequences

• Smallest natural number k such that periodic part of 1/sqrt(k) is n (or 0 if no such number exists).at n=28A037211
• Binomial transform of A084136.at n=12A084137
• Expansion of (1+4*x-12*x^2-16*x^3)/((2*x+1)*(2*x-1)*(4*x^2+4*x-1)).at n=11A110046
• One quarter the number of nX7 1..4 arrays with no two neighbors of any element equal to each other.at n=11A183359
• One quarter the number of nX8 1..4 arrays with no two neighbors of any element equal to each other.at n=10A183360
• Number of 6Xn 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically.at n=13A208145
• Squares s such that first m and last m digits of the binary representation are perfect positive squares written in binary, and m = floor(binaryLength(s)/2), where binaryLength(s) = A070939(s) is the binary length of s.at n=13A226836
• Let (P,<) be the strict partial order on the subsets of {1,2,...,n} ordered by their cardinality. Then a(n) is the number of paths of any length from {} to {1,2,...,n}.at n=7A304902