940900

Appears in sequences

• Squares of even heptagonal numbers.at n=10A014792
• Squares whose digits are squares.at n=28A019544
• a(n) and floor(a(n)/6) are both squares; i.e., squares that remain squares when written in base 6 and last digit is removed.at n=11A055851
• a(n) = {n^2}_{n^2}.at n=21A122626
• Number of n X 7 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 0 1 1 vertically.at n=9A208068
• Numbers k such that (65*k)^2 can be represented in exactly 4 ways as the sum of a positive square and a positive fourth power.at n=19A346594