Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 8.
A154071
Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 8.
Terms
- a(0) =990a(1) =3472a(2) =5217a(3) =7165a(4) =5966a(5) =5372a(6) =3621a(7) =1629a(8) =738a(9) =448a(10) =184a(11) =109a(12) =100a(13) =87a(14) =87a(15) =87a(16) =87a(17) =87a(18) =87a(19) =87a(20) =87a(21) =87a(22) =87a(23) =87a(24) =87a(25) =87a(26) =87a(27) =87a(28) =87a(29) =87
External references
- oeis: A154071