A123777
Number of ways to build a contiguous building with n LEGO blocks of size 1 X 3 on top of a fixed block of the same size so that the building is flat, i.e., with all blocks in parallel position and symmetric after a rotation by 180 degrees.
Original entry on oeis.org
1, 2, 3, 7, 14, 37, 76, 217, 473, 1374, 3104, 9196, 21240, 63929, 150294, 456703, 1089683, 3338624, 8055267, 24845592, 60511113, 187665038, 460638240
Offset: 1
A123778
Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 4.
Original entry on oeis.org
1, 12, 425, 17610, 818803, 40408828, 2078794759, 110210311068
Offset: 1
A123779
Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 4 which is symmetric after a rotation by 180 degrees.
Original entry on oeis.org
1, 1, 21, 67, 849, 3185, 39868, 162562, 2027829
Offset: 1
A123780
Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 4 which is flat, i.e., with all blocks in parallel position.
Original entry on oeis.org
1, 4, 33, 294, 2951, 30668, 328999, 3596934, 39932206, 448517488, 5086259884, 58135266335
Offset: 1
A123781
Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 4 which is flat, i.e., with all blocks in parallel position and symmetric after a rotation by 180 degrees.
Original entry on oeis.org
1, 1, 5, 7, 41, 65, 384, 649, 3853, 6745, 40209, 72334, 431188, 791144, 4717533, 8787824, 52396271, 98784645
Offset: 1
A123782
Number of ways to build a contiguous building with n LEGO blocks of size 1 X 4 on top of a fixed block of the same size.
Original entry on oeis.org
23, 679, 27591, 1227556, 59212274, 2990304700, 156407426393
Offset: 1
A123783
Number of ways to build a contiguous building with n LEGO blocks of size 1 X 4 on top of a fixed block of the same size so that the building is symmetric after a rotation by 180 degrees.
Original entry on oeis.org
1, 11, 21, 248, 712, 9182, 28297, 375483, 1266013
Offset: 1
A123784
Number of ways to build a contiguous building with n LEGO blocks of size 1 X 4 on top of a fixed block of the same size so that the building is flat, i.e., with all blocks in parallel position.
Original entry on oeis.org
7, 55, 511, 5000, 51674, 547204, 5940045, 65472189, 731569499, 8258444996, 94045306573
Offset: 1
A123785
Number of ways to build a contiguous building with n LEGO blocks of size 1 X 4 on top of a fixed block of the same size so that the building is flat, i.e., with all blocks in parallel position and symmetric after a rotation by 180 degrees.
Original entry on oeis.org
1, 3, 5, 16, 36, 124, 287, 1043, 2573, 9448, 24161, 89827, 235902, 886047, 2372494, 8968829, 24410414, 92783928, 255723571, 976331352
Offset: 1
A123786
Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 5.
Original entry on oeis.org
1, 18, 952, 60878, 4319328, 325354277, 25539764546, 2066227060325
Offset: 1
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