6684672

Appears in sequences

• a(n) is the number of occurrences of 11s in the palindromic compositions of m=2*n-1 = the number of occurrences of 12s in the palindromic compositions of m=2*n.at n=17A079863
• Number of n X n orthogonal matrices over GF(2) modulo permutations of rows.at n=9A088437
• Number of ternary Lyndon words with exactly four 1's.at n=14A124722
• a(n) = (n/4)*2^(n/2)*((1+sqrt(2))^2 + (-1)^n*(1-sqrt(2))^2).at n=34A187272
• Expansion of x^3*(3*x - 2)/(2*x - 1)^3.at n=19A268586