T(n,k)=Number of n X n 0..k arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order.
A229774
T(n,k)=Number of n X n 0..k arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order.
Terms
- a(0) =2a(1) =3a(2) =6a(3) =4a(4) =22a(5) =20a(6) =5a(7) =60a(8) =322a(9) =70a(10) =6a(11) =135a(12) =3232a(13) =12958a(14) =252a(15) =7a(16) =266a(17) =21331a(18) =1058494a(19) =2179956a(20) =924a(21) =8a(22) =476a(23) =103222a(24) =35452250a(25) =3062815568a(26) =1976588468a(27) =3432a(28) =9a(29) =792
External references
- oeis: A229774