The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A310640 Coordination sequence Gal.6.527.2 where G.u.t.v denotes the coordination sequence for a vertex of type v in tiling number t in the Galebach list of u-uniform tilings. 0
 1, 4, 6, 14, 17, 21, 28, 28, 36, 36, 44, 47, 51, 58, 58, 66, 66, 74, 77, 81, 88, 88, 96, 96, 104, 107, 111, 118, 118, 126, 126, 134, 137, 141, 148, 148, 156, 156, 164, 167, 171, 178, 178, 186, 186, 194, 197, 201, 208, 208 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Note that there may be other vertices in the Galebach list of u-uniform tilings with u <= 6 that have this same coordination sequence. See the Galebach link for the complete list of A-numbers for all these tilings. Conjectures: for k >= 1, a(7*k-1) = a(7*k) = 28 + (k-1)*30 and a(7*k+1) = a(7*k+2) = 36 + (k-1)*30. - Bernard Schott, Dec 24 2019 LINKS Table of n, a(n) for n=0..49. Brian Galebach, k-uniform tilings (k <= 6) and their A-numbers FORMULA Conjectures from Chai Wah Wu, Dec 24 2019: (Start) a(n) = a(n-1) + a(n-7) - a(n-8) for n > 9. G.f.: (-2*x^9 + 5*x^8 - x^7 + 7*x^6 + 4*x^5 + 3*x^4 + 8*x^3 + 2*x^2 + 3*x + 1)/(x^8 - x^7 - x + 1). (End) CROSSREFS Sequence in context: A310637 A310638 A310639 * A310641 A024461 A063811 Adjacent sequences: A310637 A310638 A310639 * A310641 A310642 A310643 KEYWORD nonn AUTHOR Brian Galebach and N. J. A. Sloane, Jun 18 2018 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 3 11:38 EDT 2023. Contains 365861 sequences. (Running on oeis4.)