375698

Appears in sequences

• T(n,k) is the number of (n+2) X k 0..2 arrays with all rows having a nonnegative second derivative, and all columns having a positive second derivative in a quadratic least squares fit, with one and two element arrays taken as having a zero second derivative.at n=15A223391
• Number of 3Xn 0..2 arrays with all rows having a nonnegative second derivative, and all columns having a positive second derivative in a quadratic least squares fit, with one and two element arrays taken as having a zero second derivative.at n=5A223392
• Number T(n,k) of sets of nonempty words with a total of n letters over k-ary alphabet such that all k letters occur at least once in the set; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=40A319501
• Number of sets of nonempty words with a total of 2n letters over n-ary alphabet such that all n letters occur at least once in the set.at n=4A319519
• Number of sets of nonempty words with a total of n letters over quaternary alphabet such that all letters occur at least once in the set.at n=4A320205