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A032042
Shifts left under "BFJ" (reversible, size, labeled) transform.
0
1, 1, 1, 4, 8, 38, 326, 2160, 13672, 108016, 1647056, 13919360, 184552992, 2364307504, 35702423952, 561395873376, 8826779987168, 155426050764608, 2946685004213600, 55885619348013312
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OFFSET
1,4
LINKS
Table of n, a(n) for n=1..20.
CROSSREFS
Sequence in context:
A001889
A032138
A032151
*
A032056
A214535
A321717
Adjacent sequences:
A032039
A032040
A032041
*
A032043
A032044
A032045
KEYWORD
nonn
,
eigen
AUTHOR
Christian G. Bower
STATUS
approved
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Last modified April 24 18:17 EDT 2024. Contains 371962 sequences. (Running on oeis4.)