3145725

Appears in sequences

• New record highs reached in A060030.at n=40A060482
• G.f.: (x+2)*(x+1)/((x-1)*(x-2)) = Sum_{n>=0} a(n)*(x/2)^n.at n=20A068156
• Number of distinct self-dual normal bases for GF(2^n) over GF(2).at n=54A135488
• a(n) = a(n-1) + 2*a(n-2) - 2*a(n-3).at n=39A136252
• 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=21A147758
• Number of reduced words of length n in Coxeter group on 3 generators S_i with relations (S_i)^2 = (S_i S_j)^21 = I.at n=21A168872
• a(2*k) = 3*2^k - 3, a(2*k+1) = 2^(k+2) - 3.at n=40A354788
• Indices of records in A389240.at n=25A386819