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A192312
1-sequence of reduction of (3n-2) by x^2 -> x+1.
1
0, 4, 11, 31, 70, 150, 302, 588, 1113, 2065, 3770, 6796, 12124, 21444, 37655, 65715, 114078, 197122, 339242, 581740, 994405, 1694949, 2881586, 4887576, 8272440, 13974340, 23564387, 39670663, 66684598, 111936750
OFFSET
1,2
COMMENTS
1
FORMULA
Empirical G.f.: x^2*(4-x+2*x^2)/(1-x)/(1-x-x^2)^2. [Colin Barker, Feb 11 2012]
MATHEMATICA
(See A192311.)
CROSSREFS
Sequence in context: A183121 A104743 A165993 * A004080 A298300 A027115
KEYWORD
nonn
AUTHOR
Clark Kimberling, Jun 27 2011
STATUS
approved