27302

Appears in sequences

• Values of n associated with A033705.at n=33A033707
• Take n points in general position in the plane; draw all the (infinite) straight lines joining them; sequence gives number of connected regions formed.at n=23A055503
• Numbers that are 4-digit palindromes in at least 2 bases.at n=32A180453
• Number of partitions of n such that (greatest part) <= (multiplicity of least part).at n=49A240182
• Rectangular array A read by upward antidiagonals in which the entry in row n and column k is defined by A(n,k) = (2^a(n)*(6*k - (3 - (-1)^a(n))*(1 - (-1)^n)/2) - 2^n + 4)/6, n,k >= 1, where {a(n)} is the Beatty sequence A117630 defined by a(n) = floor(n*log(3)/log(3/2)).at n=31A254312
• Numbers n such that phi(n) = 2*phi(n-2).at n=19A258454
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 3", based on the 5-celled von Neumann neighborhood.at n=33A269912
• Relative of Hofstadter Q-sequence: a(n) = max(0, n+27298) for n <= 0; a(n) = a(n-a(n-1)) + a(n-a(n-2)) + a(n-a(n-3)) for n > 0.at n=5A283888
• Relative of Hofstadter Q-sequence: a(n) = max(0, n+27298) for n <= 0; a(n) = a(n-a(n-1)) + a(n-a(n-2)) + a(n-a(n-3)) for n > 0.at n=38A283888
• G.f. A(x) satisfies: 1 + x = P(A(x)) / Q(A(x)), where P(x) = Product_{n>=0} (1 + x^(5*n+1))*(1 + x^(5*n+4)) and Q(x) = Product_{n>=0} (1 + x^(5*n+2))*(1 + x^(5*n+3)), with A(0) = 0, A'(0) = 1.at n=8A351634