Number of 2Xn 0..2 arrays with row sums nondecreasing and column sums unimodal.

A223816

Number of 2Xn 0..2 arrays with row sums nondecreasing and column sums unimodal.

Terms

    a(0) =6a(1) =50a(2) =337a(3) =1922a(4) =9783a(5) =45537a(6) =198252a(7) =817482a(8) =3229096a(9) =12308970a(10) =45575437a(11) =164673074a(12) =582981253a(13) =2028408899a(14) =6954637113a(15) =23545924195a(16) =78860147938a(17) =261655333573a(18) =861137618468

External references