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A093144 Third binomial transform of Pell(3*n)/Pell(3). 2
0, 1, 20, 350, 6000, 102500, 1750000, 29875000, 510000000, 8706250000, 148625000000, 2537187500000, 43312500000000, 739390625000000, 12622187500000000, 215474218750000000, 3678375000000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
FORMULA
G.f.: x/(1-20*x+50*x^2);
a(n) = ((10 + 5*sqrt(2))^n - (10 - 5*sqrt(2))^n)/(10*sqrt(2)).
MATHEMATICA
LinearRecurrence[{20, -50}, {0, 1}, 30] (* Harvey P. Dale, Aug 04 2021 *)
CROSSREFS
Sequence in context: A272183 A005748 A230236 * A285393 A156455 A358365
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Mar 26 2004
STATUS
approved

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)