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Search: id:A153948
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A153948 Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 6 ones in any 4 X 4 X 4 subtriangle. +0
1
1, 2, 4, 16, 48, 338, 2112, 27873, 325940, 7927215, 173294023, 7887044079, 319688425834, 27098632121268, 2049789115719959, 323784392678130807, 45665932705751433387, 13440450508552654148691 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A153951 A165905 A104354 this_sequence A010362 A001472 A053498

Adjacent sequences: A153945 A153946 A153947 this_sequence A153949 A153950 A153951

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Jan 03 2009

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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