Number of n X 6 nonnegative integer arrays with upper left 0 and lower right n+6-4 and value increasing by 0 or 1 with every step right or down.
A252874
Number of n X 6 nonnegative integer arrays with upper left 0 and lower right n+6-4 and value increasing by 0 or 1 with every step right or down.
Terms
- a(0) =10a(1) =120a(2) =949a(3) =5281a(4) =23203a(5) =85801a(6) =277585a(7) =806347a(8) =2142634a(9) =5281314a(10) =12207123a(11) =26687363a(12) =55571337a(13) =110851465a(14) =212839721a(15) =394940091a(16) =710658874a(17) =1243696244a(18) =2122211729a(19) =3538661109a(20) =5776971495a(21) =9249264713a(22) =14544867193a(23) =22494968931
External references
- oeis: A252874