44288

Appears in sequences

• Numbers k such that 2*6^k - 1 is prime.at n=40A057472
• Expansion of (1-x)/(1+2*x+2*x^2+2*x^3).at n=24A078071
• a(n) = 2^n*(n^3 - 3*n^2 + 2*n + 48)/48.at n=11A081913
• a(n) = -2*a(n-1) + 3*a(n-2), with a(0)=1, a(1)=2.at n=11A084222
• Number of chambers in root systems of type A_n.at n=5A119668
• Numbers occurring in A137822 : first differences of numbers n such that 3 | sum( Catalan(k), k=1..2n).at n=16A137823
• Number of (6*n) X 6 binary arrays with rows in nonincreasing order, n ones in every column and no more than 2 ones in any row.at n=3A188400
• T(n,k) = Number of (n*k) X k binary arrays with rows in nonincreasing order, n ones in every column and no more than 2 ones in any row.at n=30A188403
• Number of (3*n) X n binary arrays with rows in nonincreasing order, 3 ones in every column and no more than 3 ones in any row.at n=5A188404
• Number of 0..2 arrays x(0..n-1) of n elements with each no smaller than the sum of its three previous neighbors modulo 3.at n=14A200662
• a(n) = (n^3+5*n+3)/3 + 2*floor(n/2) + a(n-2), with a(0)=1 and a(1)=3.at n=31A336529