144400

Appears in sequences

• a(n) = (10*n)^2.at n=38A017270
• a(n) = (11*n + 6)^2.at n=34A017462
• a(n) = (12*n + 8)^2.at n=31A017618
• Squares whose digits are squares.at n=23A019544
• Number of ways to place a non-attacking white and black rook on n X n chessboard.at n=19A035287
• Squares which are the concatenation of two nonzero squares.at n=18A039686
• Squares the sum of the squares of whose digits are squares.at n=22A061090
• Squares such that (1) each digit is a square, (2) the sum of squares of the digits is a square.at n=11A061272
• Squares arising in A085039. n-th partial sum of A085039.at n=21A085040
• Square perimeters of primitive Pythagorean triangles.at n=13A120089
• Squares with an even number of digits, where the first half is a square and the second half is a nonzero square.at n=2A145848
• Squares which are concatenation of two positive squares with possible intervening zeros.at n=20A147608
• Squares whose decimal expansion contains no digit greater than 4.at n=36A158082
• Numbers with 45 divisors.at n=27A175752
• Numbers of the form p^4*q^2*r^2 where p, q, and r are distinct primes.at n=25A179746
• Number of Dyck n-paths all of whose ascents have lengths equal to 1 (mod 4).at n=17A212384
• Perfect squares which can be written in all the four forms a^2+b^2, a^2+2*b^2, a^2+3*b^2 and a^2+7*b^2, with a > 0 and b > 0.at n=36A216682
• Squares, without multiplicity, that are the concatenation of two integers (without leading zeros) the product of which is also a square.at n=19A258060
• Squares whose largest decimal digit is 4.at n=25A277948
• Crossing number of the n-crown graph (conjectured).at n=40A307182