Number of n X 4 nonnegative integer arrays with each row and column increasing from zero by 0, 1 or 2.
A202808
Number of n X 4 nonnegative integer arrays with each row and column increasing from zero by 0, 1 or 2.
Terms
- a(0) =1a(1) =10a(2) =121a(3) =1177a(4) =8232a(5) =43483a(6) =185051a(7) =666610a(8) =2105474a(9) =5980085a(10) =15560519a(11) =37618385a(12) =85418437a(13) =183739050a(14) =377000959a(15) =742024924a(16) =1407514167a(17) =2583094972a(18) =4601680965a(19) =7980089529a(20) =13504273038a(21) =22347278077a(22) =36230162235a(23) =57638635054
External references
- oeis: A202808