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A203642
Number of arrays of n 0..11 integers with new values introduced in order 0..11 but otherwise unconstrained
2
1, 2, 5, 15, 52, 203, 877, 4140, 21147, 115975, 678570, 4213597, 27644436, 190899230, 1382953889, 10479970386, 82859701769, 681942165393, 5829591731684, 51656311613107, 473501669531146, 4480550589850064, 43672799989835155
OFFSET
1,2
COMMENTS
Column 11 ofA203647
LINKS
Index entries for linear recurrences with constant coefficients,signature (67, -1980, 33990, -375573, 2795331, -14241590, 49412660, -113667576, 163671552, -131172480, 43545600).
FORMULA
Empirical: a(n) = 67*a(n-1) -1980*a(n-2) +33990*a(n-3) -375573*a(n-4) +2795331*a(n-5) -14241590*a(n-6) +49412660*a(n-7) -113667576*a(n-8) +163671552*a(n-9) -131172480*a(n-10) +43545600*a(n-11)
Empirical formula confirmed by extension of first ten columns, seeA203641.-Ray Chandler,Jul 06 2024
KEYWORD
nonn
AUTHOR
R. H. HardinJan 04 2012
STATUS
approved