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A214267
Duplicate of A005437.
1
1, 1, 1, 2, 4, 14, 46, 224, 1024, 6320, 36976, 275792, 1965664, 17180144, 144361456, 1446351104, 13997185024, 158116017920, 1731678144256, 21771730437632, 266182076161024, 3686171162253824, 49763143319190016, 752594181757712384, 11118629668610842624
OFFSET
0,4
CROSSREFS
Sequence in context: A149852 A263740 A005437 * A266695 A327034 A263741
KEYWORD
dead
AUTHOR
Peter Luschny, Jul 09 2012
STATUS
approved