27030

Appears in sequences

• First n elements of Thue-Morse sequence A010060 read as a binary number.at n=15A019300
• a(n) = n^3 + n.at n=30A034262
• Numbers whose base-4 representation contains exactly four 1's and four 2's.at n=28A045109
• Numerators of ratios converging to Thue-Morse constant.at n=4A048707
• Least k such that the least factor of k^Phi(k) -1 is the n-th prime.at n=21A066732
• a(n) = n*(n^2 + 1) if n is even, otherwise (n - 1/2)*(n^2 + 1).at n=30A071289
• List of codewords in binary lexicode with Hamming distance 8 written as decimal numbers.at n=15A075940
• Consider the Thue-Morse sequence (A010060) at each iteration. Read each reversed string as a binary number and convert it to a decimal number.at n=4A122570
• Row sums of triangle A131252.at n=16A131253
• a(n) = n + [n^2 if n is odd or n^3 if n is even].at n=29A181427
• Replace 3^i with n^i in ternary representation of n.at n=29A193760
• 4 X 4 X 4 triangular graph without horizontal edges coloring a rectangular array: number of n X 1 0..9 arrays where 0..9 label nodes of a graph with edges 0,1 0,2 1,3 1,4 2,4 2,5 3,6 3,7 4,7 4,8 5,8 5,9 and every array movement to a horizontal or vertical neighbor moves along an edge of this graph.at n=8A223408
• Big equivalence classes (A227723) related to subgroups of nimber addition (A190939).at n=14A227960
• Rows of binary Walsh matrices interpreted as reverse binary numbers.at n=30A228539
• Number of positive solutions to x^2+y^2+z^2 <= n^2.at n=38A253663
• Number of (3+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=23A258556
• Number of (n+2) X (4+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010001 00010101 or 01010101.at n=6A261109
• Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010001 00010101 or 01010101.at n=3A261112
• Areas of integer-sided triangles whose area equals 5 times their perimeter.at n=43A289221
• Consider A010060 as a 2-adic number ...100110010110, then a(n) is its approximation up to 2^n.at n=15A320916