52992

Appears in sequences

• Values of phi(k) when phi(k) = phi(k+1).at n=37A003275
• Place n equally-spaced points around a circle and join every pair of points by a chord; this divides the circle into a(n) regions.at n=35A006533
• a(n) = Sum_{k >= 0} 2^k * binomial(k+2,n-2*k).at n=19A061279
• a(n) = Sum_{j=0..n} A000293(j).at n=13A143123
• Number of 5 X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 0 and 1 1 1 vertically.at n=8A209226
• First position of A218860(n) in A066135.at n=23A218861
• The greedy sequence of real numbers at least 1 that do not contain any 3-term geometric progressions with integer ratio.at n=27A235054
• Numbers whose base-b expansions, for both b=3 and b=4, include no digits other than 0 and b-1.at n=4A261970
• Sum of odd divisors of Lucas(n).at n=23A280108
• Expansion of Product_{k=1..24} theta_3(q^k), where theta_3() is the Jacobi theta function.at n=37A320248
• a(n) = n*n! / Product_{k=1..n} radical(k), where radical(n) is the product of distinct prime factors of n, cf. A007947.at n=23A387151