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A081666
n*3^(n-1)+A081567(n).
1
1, 4, 16, 62, 233, 855, 3083, 10978, 38746, 135924, 474955, 1655789, 5766389, 20080608, 69976772, 244166410, 853410637, 2988825507, 10490538559, 36905911166, 130139760590, 459970519296, 1629395348591, 5784362027257
OFFSET
0,2
COMMENTS
Binomial transform of A081663.
FORMULA
a(n)=A027471(n-1)+A081567(n) G.f.: (1-7x+16x^2-13x^3)/((3x - 1)^2(5x^2-5x+1))
MATHEMATICA
LinearRecurrence[{11, -44, 75, -45}, {1, 4, 16, 62}, 30] (* Harvey P. Dale, Aug 06 2022 *)
CROSSREFS
Cf. A000045.
Sequence in context: A365860 A276042 A084859 * A250346 A085781 A113438
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Mar 26 2003
STATUS
approved