400040001

Appears in sequences

• Squares composed of digits {0,1,4}, not ending with zero.at n=12A058414
• a(1) = 1; a(n+1) = smallest square > a(n) with leading digit equal to final digit of a(n) and final digit not 0.at n=16A061449
• Squares whose arithmetic mean of digits is 1 (i.e., the sum of digits equals the number of digits).at n=22A316481
• Squares k that are not divisible by 10, and whose reverse and digit sum are also squares, such that the digit sum divides both k and its reverse.at n=19A354078