Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 3 ones in any 5 X 5 X 5 subtriangle.
A153927
Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 3 ones in any 5 X 5 X 5 subtriangle.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =16a(5) =32a(6) =84a(7) =364a(8) =1408a(9) =7139a(10) =31239a(11) =217079a(12) =1318253a(13) =12282116a(14) =97242555a(15) =1151164326a(16) =12499753964a(17) =202416004411
External references
- oeis: A153927