Number of 9-compositions of n: matrices with 9 rows of nonnegative integers with positive column sums and total element sum n.
A261801
Number of 9-compositions of n: matrices with 9 rows of nonnegative integers with positive column sums and total element sum n.
Terms
- a(0) =1a(1) =9a(2) =126a(3) =1704a(4) =22986a(5) =310086a(6) =4183260a(7) =56435004a(8) =761346207a(9) =10271072557a(10) =138563678736
External references
- oeis: A261801