Number of distinct structures that can be made from n cubes without overhangs.
A331621
Number of distinct structures that can be made from n cubes without overhangs.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =35a(6) =129a(7) =495a(8) =2101a(9) =9154a(10) =41356a(11) =189466a(12) =880156a(13) =4120515a(14) =19425037a(15) =92038062a(16) =438030079a(17) =2092403558a(18) =10027947217a(19) =48198234188a(20) =232261124908
External references
- oeis: A331621