140152

Appears in sequences

• Number of self-inverse permutations on n letters, also known as involutions; number of standard Young tableaux with n cells.at n=12A000085
• Bisection of A000085.at n=6A066223
• Number of regions in an equilateral triangular figure formed by the straight line segments connecting all vertices and all points that divide the sides into n equal parts.at n=16A092867
• Number of 12 X 12 arrays of squares of integers, symmetric about main diagonal, with all rows summing to n.at n=1A156409
• Number of 0..4 colorings of a 1 X (n+1) array circular in the n+1 direction with new values 0..4 introduced in row major order.at n=10A214142
• Number of standard Young tableaux of n cells and height <= 12.at n=12A229068
• Number A(n,k) of set partitions of {1,...,k*n} into sets of size at most n; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=38A229243
• Triangle read by rows: Number of D-classes in Partial Brauer Monoid PB_n.at n=27A276772
• Number T(n,k) of sets of exactly k nonempty words with a total of n letters over n-ary alphabet such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter; triangle T(n,k), n>=0, read by rows.at n=45A293815
• Number T(n,k) of partitions of [n] having exactly k blocks of size at least three; triangle T(n,k), n>=0, 0<=k<=floor(n/3), read by rows.at n=30A355144