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A061171 One half of second column of Lucas bisection triangle (odd part). +0
6
3, 19, 79, 283, 940, 2982, 9171, 27581, 81557, 237995, 687158, 1966764, 5588259, 15780103, 44323195, 123920827, 345062176, 957403026, 2647935987, 7302634865, 20087869313, 55128445259, 150971982314 (list; graph; listen)
OFFSET

0,1

COMMENT

Numerator of g.f. is on half of row polynomial sum(A061187(1,m)*x^m,m=0..2).

FORMULA

2*a(n)=A060924(n+1, 1).

G.f.: (1+x)*(3-2*x)/(1-3*x+x^2)^2.

CROSSREFS

Cf. A005248.

Sequence in context: A027175 A093734 A099421 this_sequence A163431 A167242 A089621

Adjacent sequences: A061168 A061169 A061170 this_sequence A061172 A061173 A061174

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Apr 20 2001

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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