27100

Appears in sequences

• Kaprekar triples: q such that q = x + y + z and q^3 = x*10^2n + y*10^n + z, where z < 10^n and n is the number of digits in q. q is not a power of 10 (except q=1).at n=13A006887
• 5-white numbers: partition digits of n^5 into blocks of 5 starting at right; sum of these 5-digit numbers equals n.at n=2A037045
• Numbers n such that 173*2^n-1 is prime.at n=26A050838
• Pseudo-Kaprekar triples: q such that if q=x+y+z, then q^3=x*10^i + y*10^j + z, where (y*10^j+z < 10^i) and z < 10^j.at n=26A060768
• Erroneous version of A006887.at n=14A060809
• "Kaprekar quintuples": digits of X^5 taken D at a time sum to X (where D is number of digits in X.)at n=4A171500
• The Wiener index of the double-comb graph \/_\/_\/...\/_\/ with 3n (n>=1) nodes. The Wiener index of a connected graph is the sum of the distances between all unordered pairs of vertices in the graph.at n=24A192025
• Table of coefficients in the iterations of Euler's tree function (A000169), as read by antidiagonals.at n=94A274390
• a(n) is the unique k such that A382357(k) = 2^n.at n=15A382360
• Order 3 perimeter magic squares of magic sum n, all elements distinct and 1 in the set; bracelet symmetry.at n=45A382455
• Numbers of terms of 1+A081411 that are divisible by prime(n).at n=23A390831