The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A008579 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A008579

Coordination sequence for planar net 3.6.3.6. Spherical growth function for a certain reflection group in plane.
(history; published version)

#88 by Alois P. Heinz at Sun Aug 07 21:29:20 EDT 2022

STATUS

editing

approved

#87 by Alois P. Heinz at Sun Aug 07 21:29:13 EDT 2022

DATA

1, 4, 8, 14, 18, 22, 28, 30, 38, 38, 48, 46, 58, 54, 68, 62, 78, 70, 88, 78, 98, 86, 108, 94, 118, 102, 128, 110, 138, 118, 148, 126, 158, 134, 168, 142, 178, 150, 188, 158, 198, 166, 208, 174, 218, 182, 228, 190, 238, 198, 248, 206, 258, 214, 268, 222, 278

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approved

editing

#86 by Alois P. Heinz at Sun Aug 07 21:27:54 EDT 2022

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reviewed

approved

#85 by Kevin Ryde at Sun Aug 07 19:14:09 EDT 2022

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proposed

reviewed

#84 by Stefano Spezia at Sun Aug 07 15:23:06 EDT 2022

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editing

proposed

#83 by Stefano Spezia at Sun Aug 07 15:22:37 EDT 2022

FORMULA

From Stefano Spezia, Aug 07 2022: (Start)

a(n) = (9 + (-1)^n)*n/2 - 2*(-1)^n for n > 1.

E.g.f.: 3 - 2*x + (4*x - 2)*cosh(x) + (5*x + 2)*sinh(x). (End)

CROSSREFS

Cf. A017137, A017365.

STATUS

approved

editing

#82 by N. J. A. Sloane at Sat Apr 04 01:31:11 EDT 2020

STATUS

editing

approved

#81 by N. J. A. Sloane at Sat Apr 04 01:31:09 EDT 2020

LINKS

Tom Karzes, <a href="/A250122/a250122.html">Tiling Coordination Sequences</a>

STATUS

approved

editing

#80 by Alois P. Heinz at Fri Feb 21 12:20:44 EST 2020

STATUS

proposed

approved

#79 by Michel Marcus at Fri Feb 21 11:15:58 EST 2020

STATUS

editing

proposed