43684

Appears in sequences

• Numerators of continued fraction convergents to sqrt(847).at n=5A042634
• Number of (n+2)X(6+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column plus the two sums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=29A259004
• First class of all proper positive solutions x1(n) = a(n) of the Pell equation x^2 - 7*y^2 = 9.at n=3A307168