54271

Appears in sequences

• Numbers whose set of base-15 digits is {1,3}.at n=32A032922
• Start with 1 and repeatedly reverse the digits and add 36 to get the next term.at n=32A118536
• Triangular array T(n,k) (n>=1, 0<=k<=n(n-1)/2) giving the total number of connected components in all subgraphs obtained from the complete labeled graph K_n by removing k edges.at n=47A125206
• Start with n, apply k->2k+1 until a semiprime is reached; sequence gives the semiprimes.at n=51A189657
• G.f.: A(x,y) = Sum_{n>=0} x^n * ((1+x)^n + y)^n, where A(0) = 0, as a triangle of coefficients T(n,k) of x^n*y^k in A(x,y) = Sum_{n>=0} x^n * Sum_{k=0..n} T(n,k)*x^n*y^k, read by rows.at n=72A325580
• Numbers that are the sum of four third powers in exactly eight ways.at n=29A345153