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A027083 T(n,n+2), T given by A027082. 1
2, 6, 14, 28, 54, 102, 190, 352, 650, 1198, 2206, 4060, 7470, 13742, 25278, 46496, 85522, 157302, 289326, 532156, 978790, 1800278, 3311230, 6090304, 11201818, 20603358, 37895486, 69700668, 128199518, 235795678, 433695870 (list; graph; refs; listen; history; internal format)
OFFSET

2,1

FORMULA

G.f.: [2x^2(1+x+x^2)]/[(1-x)(1-x-x^2-x^3)]. Cf. A008937.

A027024(n) + 1.

CROSSREFS

Sequence in context: A161212 A033547 A050531 * A169948 A192705 A123991

Adjacent sequences:  A027080 A027081 A027082 * A027084 A027085 A027086

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified February 14 17:10 EST 2012. Contains 205644 sequences.