20228

Appears in sequences

• Number of partitions of 5n such that cn(1,5) = cn(4,5) < cn(0,5) <= cn(2,5) = cn(3,5).at n=13A036890
• Numerators of continued fraction convergents to sqrt(241).at n=7A041450
• Expansion of (1 + x^2*C)*C^2, where C = (1 - sqrt(1-4*x))/(2*x) is g.f. for Catalan numbers, A000108.at n=9A071717
• Numbers n for which there are exactly six k such that n = k + (product of nonzero digits of k).at n=14A096927
• Indices n such that the 3 X 3 matrix with components (row by row) prime(n+k), 0 <= k <= 8, has zero determinant.at n=28A117345
• a(n) = floor(n*(n^3-n-3)/(2*(n-1))).at n=32A117561
• Number of subsets of {1, 2, ..., n} such that no member is a sum of distinct other members.at n=21A151897
• Number of nX2 0..3 arrays with row sums equal and column sums unequal to adjacent columns.at n=6A203026
• T(n,k)=Number of nXk 0..3 arrays with row sums equal and column sums unequal to adjacent columns.at n=34A203031
• Number of 7Xn 0..3 arrays with row sums equal and column sums unequal to adjacent columns.at n=1A203037
• Numbers n such that n!10+1 is prime.at n=44A204656
• Number of partitions of n+10 with largest inscribed rectangle having area <= n.at n=27A218631
• Number of unimodal compositions of n where the maximal part appears three times.at n=35A226541
• Number of (n+1) X (2+1) 0..1 arrays with no element having a strict majority of its horizontal and antidiagonal neighbors equal to one.at n=5A231992
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no element having a strict majority of its horizontal and antidiagonal neighbors equal to one.at n=26A231997
• Number of (6+1)X(n+1) 0..1 arrays with no element having a strict majority of its horizontal and antidiagonal neighbors equal to one.at n=1A232003
• Numbers n such that Bernoulli number B_{n} has denominator 1590.at n=31A272140
• Triangle read by rows: T(n,k) is the number of disconnected permutation graphs on n vertices with domination number k, with 2 <= k <= n.at n=39A320579
• Expansion of Product_{1 <= i <= j <= k} 1/(1 - x^(i*j*k)).at n=29A321360
• Number of regions in a "cross" of width 3 and height n (see Comments for definition).at n=16A331455