70350

Appears in sequences

• Square array T(k,n) by antidiagonals, where T(k,n) is number of ways of placing n identifiable nonnegative intervals with a total of exactly k starting and/or finishing points.at n=50A059515
• Matrix log of triangle A111820, which shifts columns left and up under matrix 5th power; these terms are the result of multiplying each element in row n and column k by (n-k)!.at n=23A111823
• Moessner triangle based on primes.at n=32A125312
• Number of 2 X 2 matrices having all terms in {1,...,n} and determinant >= 2n.at n=20A211062
• Number of arrangements on a line of n finite closed intervals (possibly of zero length) with k distinct endpoints (n >= 1, 1 <= k <= 2*n).at n=23A300729