login
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
OFFSET
0,3
COMMENTS
Essentially the first differences of A220500.
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)
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