

A008706


Coordination sequence for 3.3.3.4.4 planar net.


20



1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 155, 160, 165, 170, 175, 180, 185, 190, 195, 200, 205, 210, 215, 220
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OFFSET

0,2


COMMENTS

Also the Engel expansion of exp^(1/5); cf. A006784 for the Engel expansion definition  Benoit Cloitre, Mar 03 2002


LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..10000
Index to sequences with linear recurrences with constant coefficients, signature (2,1).


FORMULA

G.f.: (1+3x+x^2)/(1x)^2; a(n)=0^n+5n.  Paul Barry, Jul 21 2003


PROG

(MAGMA) [0^n+5*n: n in [0..50] ]; // Vincenzo Librandi, Aug 21 2011


CROSSREFS

List of coordination sequences for uniform planar nets: A008458 (the planar net 3.3.3.3.3.3), A008486 (6^3), A008574 (4.4.4.4 and 3.4.6.4), A008576 (4.8.8), A008579 (3.6.3.6), A008706 (3.3.3.4.4), A072154 (4.6.12), A219529 (3.3.4.3.4), A250120 (3.3.3.3.6), A250122 (3.12.12).
Sequence in context: A063284 A092454 A248359 * A008587 A172336 A140233
Adjacent sequences: A008703 A008704 A008705 * A008707 A008708 A008709


KEYWORD

nonn


AUTHOR

N. J. A. Sloane.


STATUS

approved



