20279

Appears in sequences

• Denominators of continued fraction convergents to sqrt(571).at n=11A042095
• The r-th term of the n-th row of the following triangle is C[{T(n)-T(r-1)},r] where T(n) is the n-th triangular number. 1 3 1 6 10 1 10 36 35 1 ... Sequence contains the row sums.at n=6A110771
• Number of planar n X n X n binary triangular grids with no more than 4 ones in any similarly oriented 3 X 3 X 3 subtriangle.at n=5A153553
• a(n) = 676*n - 1.at n=29A158393
• a(n) = 30*n^2 - 1.at n=25A158560