336736

Appears in sequences

• Numbers k such that k and k^2 use only the digits 1, 3, 6, 7 and 9.at n=30A137039
• The number of binary pattern classes in the (2,n)-rectangular grid with 6 '1's and (2n-6) '0's: two patterns are in same class if one of them can be obtained by a reflection or 180-degree rotation of the other.at n=17A228581