Layer counting sequence in the order-5 cubic honeycomb.

Terms

a(0) =1a(1) =7a(2) =37a(3) =163a(4) =661a(5) =2643a(6) =10497a(7) =41511a(8) =164073a(9) =648495a(10) =2562749a(11) =10127291a(12) =40020845a(13) =158152811a(14) =624980489a(15) =2469769903a(16) =9759926065a(17) =38568829879a(18) =152414547541a(19) =602304889075