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A171450
Sequence with Hankel transform given by 2^C(n,2)*2^floor(n/3).
1
1, 1, 2, 5, 15, 54, 231, 1133, 6082, 34397, 200063, 1180798, 7023103, 41946973, 251144922, 1505966757, 9040214223, 54314351878, 326565963479, 1964805696525, 11828911080050, 71258494789421, 429525155047263, 2590571415647886
OFFSET
0,3
COMMENTS
Hankel transform is A171451.
FORMULA
G.f.: 1/(1-x/(1-x/(1-x/(1-2x/(1-2x/(1-2x/(1-x/(1-x/(1-x/(1-2x/(1-... (continued fraction).
CROSSREFS
Sequence in context: A321958 A107112 A193318 * A204190 A051295 A334154
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Dec 09 2009
STATUS
approved