Number of nX3 0..1 arrays with row sums nondecreasing and column sums unimodal.

A223621

Number of nX3 0..1 arrays with row sums nondecreasing and column sums unimodal.

Terms

    a(0) =7a(1) =35a(2) =147a(3) =574a(4) =2114a(5) =7504a(6) =26050a(7) =88627a(8) =296989a(9) =985303a(10) =3236269a(11) =10543598a(12) =34156986a(13) =109995484a(14) =352428398a(15) =1125103059a(16) =3577593997a(17) =11336743971a(18) =35833521825a(19) =112944171696a(20) =355097604934

External references