12582909

Appears in sequences

• G.f.: (x+2)*(x+1)/((x-1)*(x-2)) = Sum_{n>=0} a(n)*(x/2)^n.at n=22A068156
• Numbers whose binary representation is a palindrome formed from the reflected decimal expansion of the concatenation of 1, 0 and infinite digits 1.at n=23A147758
• Number of reduced words of length n in Coxeter group on 3 generators S_i with relations (S_i)^2 = (S_i S_j)^23 = I.at n=23A168968
• a(2*k) = 3*2^k - 3, a(2*k+1) = 2^(k+2) - 3.at n=44A354788