51205

Appears in sequences

• Number of domino tilings of 4 X (n-1) board.at n=12A005178
• Number of perfect matchings in graph P_{11} X P_{2n}.at n=2A028473
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+119)^2 = y^2.at n=34A129837
• Number of lower triangles of an n X n integer array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by 5 or less and triangles differing by a constant counted only once.at n=2A195217
• T(n,k) is the number of lower triangles of an n X n integer array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by k or less and triangles differing by a constant counted only once.at n=23A195220
• Number of lower triangles of a 3 X 3 integer array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by n or less and triangles differing by a constant counted only once.at n=4A195221
• Number of domino tilings of the 11 X n grid with upper left corner removed iff n is odd.at n=4A210724
• A linear divisibility sequence of the fourth order related to A003779.at n=5A241606
• Occurrences of decrease of the probability density P(n) of coprime numbers k,m, satisfying 1 <= k <= a(n) and 1 <= m <= a(n), and a(n) congruent to 1 (mod 2) and a(n) not congruent to 3 (mod 6).at n=18A280879
• The odd edge of a primitive 3-simplex (0, b=A031173, c=A031174, d=A031175).at n=46A298047
• Number of n-digit numbers that have exactly 3 divisors.at n=11A379566