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A203073
G.f.: (4-4*x-20*x^2)/(1-19*x+2*x^2+78*x^3).
0
4, 72, 1340, 25004, 466780, 8714292, 162687676, 3037228420, 56702249852, 1058578651620, 19762686064316, 368951102430308, 6887976439220860, 128592160627319076, 2400696913051056700, 44818794864456212068, 836725520069635027964, 15620892932376170684580, 291627648675580388409788, 5444418948405843506235620
OFFSET
0,1
REFERENCES
Epstein, David B. A.; Iano-Fletcher, Anthony R.; and Zwick, Uri; Growth functions and automatic groups. Experiment. Math. 5 (1996), no. 4, 297-315.
CROSSREFS
Sequence in context: A111868 A060645 A363987 * A231033 A307358 A201976
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Dec 28 2011
STATUS
approved