54757

Appears in sequences

• a(n) is the smallest positive integer k such that, if kn is written in base 2, it requires exactly n ones.at n=18A102032
• a(n) = 36*n^2 + 1.at n=39A158591
• Continued fraction expansion for exp( Sum_{n>=1} 1/(n*A085447(n)) ), where A085447(n) = (3+sqrt(10))^n + (3-sqrt(10))^n.at n=8A174507
• Necklace Catalan numbers.at n=11A291292
• Odd composite integers m such that U(m)^2 == 1 (mod m) and V(m) == 6 (mod m), where U(m) and V(m) are the m-th generalized Lucas and Pell-Lucas numbers of parameters a=6 and b=-1, respectively.at n=38A337629
• a(n) = (-1)^n + Sum_{k=0..floor((n-1)/2)} a(k) * a(n-2*k-1).at n=36A351973
• a(n) = 8*n^3 - 6*n - 1.at n=19A369922