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A008580 Crystal ball sequence for planar net 3.6.3.6. 1
1, 5, 13, 27, 45, 67, 95, 125, 163, 201, 249, 295, 353, 407, 475, 537, 615, 685, 773, 851, 949, 1035, 1143, 1237, 1355, 1457, 1585, 1695, 1833, 1951, 2099, 2225, 2383, 2517, 2685, 2827, 3005, 3155, 3343 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

LINKS

T. D. Noe, Table of n, a(n) for n=0..1000

Index entries for crystal ball sequences

FORMULA

G.f.: [(1+2x)(1+2x+2x^2+2x^3-x^4)]/[(1-x)^3(1+x)^2]. - R. Stephan, Apr 24 2004

CROSSREFS

Sequence in context: A160420 A182840 A147411 * A123326 A025193 A002717

Adjacent sequences:  A008577 A008578 A008579 * A008581 A008582 A008583

KEYWORD

nonn,nice

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 14 19:37 EST 2012. Contains 205663 sequences.