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A301301 Coordination sequence for node of type V2 in "krq" 2-D tiling (or net). 38
1, 4, 8, 12, 16, 20, 25, 30, 34, 39, 43, 47, 53, 56, 60, 65, 68, 75, 78, 81, 87, 89, 97, 100, 102, 109, 110, 119, 122, 123, 131, 131, 141, 144, 144, 153, 152, 163, 166, 165, 175, 173, 185, 188, 186, 197, 194, 207, 210, 207, 219, 215, 229, 232, 228, 241, 236, 251, 254, 249, 263, 257, 273, 276, 270, 285, 278, 295, 298, 291, 307, 299, 317, 320, 312, 329, 320, 339, 342, 333, 351, 341, 361, 364, 354, 373, 362, 383, 386, 375, 395, 383, 405, 408, 396, 417, 404, 427, 430, 417, 439 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

Branko Gr├╝nbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987. See Table 2.2.1, page 66, bottom row, 2nd tiling.

LINKS

Table of n, a(n) for n=0..100.

Brian Galebach, Collection of n-Uniform Tilings. See Number 5 from the list of 20 2-uniform tilings.

Brian Galebach, k-uniform tilings (k <= 6) and their A-numbers

Reticular Chemistry Structure Resource (RCSR), The krq tiling (or net)

FORMULA

Conjecture: G.f. = -(x^17+x^16+x^15+2*x^14-x^12-x^11-4*x^10-7*x^9-10*x^8-14*x^7-17*x^6-18*x^5-16*x^4-12*x^3-8*x^2-4*x-1)/(x^10-2*x^5+1). - N. J. A. Sloane, Mar 29 2018

CROSSREFS

Cf. A301299.

Coordination sequences for the 20 2-uniform tilings in the order in which they appear in the Galebach catalog, together with their names in the RCSR database (two sequences per tiling): #1 krt A265035, A265036; #2 cph A301287, A301289; #3 krm A301291, A301293; #4 krl A301298, A298024; #5 krq A301299, A301301; #6 krs A301674, A301676; #7 krr A301670, A301672; #8 krk A301291, A301293; #9 krn A301678, A301680; #10 krg A301682, A301684; #11 bew A008574, A296910; #12 krh A301686, A301688; #13 krf A301690, A301692; #14 krd A301694, A219529; #15 krc A301708, A301710; #16 usm A301712, A301714; #17 krj A219529, A301697; #18 kre A301716, A301718; #19 krb A301720, A301722; #20 kra A301724, A301726.

Sequence in context: A311199 A311200 A311201 * A311202 A311203 A311204

Adjacent sequences:  A301298 A301299 A301300 * A301302 A301303 A301304

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Mar 25 2018

EXTENSIONS

a(11)-a(100) from Davide M. Proserpio, Mar 28 2018

DATA section contains 100 terms - this was deliberate. If you want to shorten this section, kindly add a b-file first. - N. J. A. Sloane, Mar 29 2018

STATUS

approved

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Last modified February 16 08:26 EST 2019. Contains 320159 sequences. (Running on oeis4.)