49150

Appears in sequences

• a(2*n) = 3*2^n - 2; a(2*n+1) = 2^(n+2) - 2.at n=28A027383
• a(n) = 3*2^n - 2.at n=14A033484
• Add 1, double, add 1, double, etc.at n=28A083416
• a(n) = B(2*n, 2)/B(2*n) (see formula section).at n=7A096045
• Duplicate of A033484.at n=14A099018
• Start with 1, then alternately double or add 2.at n=28A099942
• Numbers k such that hcl(k,k) < hcl(k,k-1) where hcl(k,i) is the Huffman code length; see comments.at n=27A126269
• Number of 2's in row n of the Kolakoski fan A143477.at n=28A143588
• Expansion of x*(3*x^2+x+1)/((x-1)*(2*x-1)*(x+1)).at n=15A192033
• Number of 3 X n 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally, with no adjacent elements equal.at n=8A232337
• a(n) = 3*2^n - 2*(-1)^n.at n=14A259713
• Number of n X 3 integer arrays with each element equal to the number of horizontal and antidiagonal neighbors equal to itself.at n=15A266007
• a(0) = 1, a(n+1) = 2*a(n) + periodic sequence of length 2: repeat [5, -4].at n=14A280173
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 621", based on the 5-celled von Neumann neighborhood.at n=15A283357
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 637", based on the 5-celled von Neumann neighborhood.at n=15A283406
• Number of bisymmetric, quasitrivial, and order-preserving binary operations on the n-element set {1,...,n}.at n=15A296953
• a(n) = Sum_{d|n} sigma_3(d).at n=33A321140
• Number of integer partitions of n whose multiplicities appear with distinct multiplicities.at n=48A325329
• Number of integer partitions of n whose number of submultisets is greater than n.at n=42A325831
• a(n) = n! * [x^n] (2*x - 4*exp(x) + 3*exp(2*x) + 3) / 2.at n=15A369491