Number of 4 X n binary arrays with rows and columns lexicographically nondecreasing and column sums nondecreasing.

A266430

Number of 4 X n binary arrays with rows and columns lexicographically nondecreasing and column sums nondecreasing.

Terms

    a(0) =5a(1) =22a(2) =96a(3) =404a(4) =1556a(5) =5365a(6) =16585a(7) =46463a(8) =119452a(9) =285124a(10) =638247a(11) =1351194a(12) =2724385a(13) =5262379a(14) =9785590a(15) =17590461a(16) =30674359a(17) =52045522a(18) =86143170a(19) =139398464a(20) =220973442a(21) =343722465a(22) =525429159a(23) =790381435a(24) =1171358006a(25) =1712112000a(26) =2470450897

External references