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A023549 Convolution of natural numbers >= 2 and Lucas numbers. 0
2, 9, 21, 43, 80, 142, 244, 411, 683, 1125, 1842, 3004, 4886, 7933, 12865, 20847, 33764, 54666, 88488, 143215, 231767, 375049, 606886, 982008, 1588970, 2571057, 4160109, 6731251 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

FORMULA

G.f.: [x(2-x)(1+2x)]/[(1-x-x^2)(1-x)^2]. - R. Stephan, Apr 05 2004

G.f.: [x(2+3x-2x^2)]/[(1-x-x^2)(1-x)^2]. - Ralf Stephan, Apr 28 2004

CROSSREFS

Sequence in context: A041963 A005476 A131476 * A192971 A024850 A056105

Adjacent sequences:  A023546 A023547 A023548 * A023550 A023551 A023552

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified February 14 22:37 EST 2012. Contains 205679 sequences.