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A220501 Number of toothpicks or D-toothpicks added at n-th stage in the structure of A220500. 20
0, 1, 4, 8, 16, 22, 24, 24, 36, 40, 32, 44, 64, 94, 72, 56, 76, 72, 32, 48, 80, 112, 140, 140, 140, 168, 120, 132, 168, 238, 168, 120, 156, 136, 32, 48, 80, 112, 140, 144, 164, 224, 216, 256, 272, 368, 324, 316, 280, 296, 160, 150, 232, 320, 404, 432, 408, 462, 300, 308, 376, 526, 360, 248, 316, 264, 32 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
Essentially the first differences of A220500.
LINKS
David Applegate, The movie version
EXAMPLE
Written as an irregular triangle the sequence begins:
0;
1;
4;
8;
16,22;
24,24,36,40;
32,44,64,94,72,56,76,72;
32,48,80,112,140...
.
From Omar E. Pol, May 02 2018: (Start)
Also the nonzero terms can be written as an irregular triangle in which the row lengths are the terms of A011782 multiplied by 2 as shown below:
1, 4;
8, 16;
22, 24, 24, 36;
40, 32, 44, 64, 94, 72, 56, 76;
72, 32, 48, 80, 112, 140, 140, 140, 168, 120, 132, 168, 238, 168, 120, 156;
136, 32, 48, 80, 112, 140, 144, 164, 224, 216, 256, 272, 368, 324, 316, 280, ...
(End)
CROSSREFS
Sequence in context: A312810 A194271 A194701 * A312811 A312812 A312813
KEYWORD
nonn,tabf
AUTHOR
Omar E. Pol, Dec 15 2012
EXTENSIONS
Terms a(23) and beyond from David Applegate's movie version. - Omar E. Pol, May 02 2018
STATUS
approved

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Last modified March 19 04:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)