287296

Appears in sequences

• Squares containing 2k digits in which the sum of the first k digits = that of the rest.at n=11A068897
• a(1) = 0, then smallest square such that a(n+1) - a(n) is a palindrome.at n=15A075056
• Numbers with 21 divisors.at n=26A137484
• a(1)=1. a(n) = the smallest integer > a(n-1) such that |d(a(n)) - d(a(n-1))| = n-1, where d(m) = the number of positive divisors of m.at n=16A139695
• Discriminant of the 47 imaginary, bicyclic, biquadratic fields with class number 1.at n=37A159456
• Square array T(n, k) = v(k, n)((1)), where v(n, q) = M*v(n-1, q), M = {{0, 1, 0}, {0, 0, 1}, {8*q^3, 6*q, 0}}, with v(0, q) = {1, 1, 1}, read by antidiagonals.at n=48A173747
• Numbers with prime factorization p^2*q^6.at n=26A189990
• Number of n 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=7A209219
• Primitive numbers whose abundance is positive and odd.at n=27A259231
• Squares that become prime when their rightmost digit is removed.at n=38A265211
• Lexicographically first sequence of distinct positive squares, no two or more of which sum to a square.at n=13A306043
• Number of permutations p of [n] such that for each i in [n] we have: (i>1) and |p(i)-p(i-1)| = 1 or (i<n) and |p(i)-p(i+1)| = 1.at n=13A363181
• Numbers that have exactly one Zumkeller divisor but are not Zumkeller.at n=20A376877