Number of nX2 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

A278621

Number of nX2 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

Terms

    a(0) =3a(1) =46a(2) =357a(3) =1952a(4) =8518a(5) =31605a(6) =103546a(7) =307087a(8) =838936a(9) =2138608a(10) =5137407a(11) =11719956a(12) =25549096a(13) =53493458a(14) =108027996a(15) =211167710a(16) =400765157a(17) =740380790a(18) =1334456849a(19) =2351234708a(20) =4056807390a(21) =6864961455a(22) =11409118950a(23) =18644841765a(24) =29994129570

External references