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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..20.

CROSSREFS

Sequence in context: A001889 A032138 A032151 * A032056 A214535 A228755

Adjacent sequences:  A032039 A032040 A032041 * A032043 A032044 A032045

KEYWORD

nonn,eigen

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified February 19 14:46 EST 2018. Contains 299334 sequences. (Running on oeis4.)