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A184409
Total number of missing toothpicks in the holes in the toothpick structure of A182840.
2
0, 0, 0, 0, 0, 0, 0, 2, 6, 6, 6, 6, 6, 8, 12, 22, 42, 42, 42, 42, 42, 42, 42, 46, 58, 68, 72, 72, 72, 100, 148, 150, 186, 186, 186, 186, 186, 186, 186, 190, 202, 210, 210, 210, 210, 214, 226, 254, 314, 356, 360, 360, 360, 360, 360, 368, 396, 524, 708, 652, 628, 676, 764, 710, 762, 762, 762, 762, 762, 762, 762, 766
OFFSET
0,8
COMMENTS
Each connected group of unoccupied lines in the hexagonal structure enclosed by toothpicks counts as a hole.
EXAMPLE
Structure after step 8:
\_/
\_/ \_/
\_/ \_/ \_/
\_/ _/ \_ \_/
/ \_/ \_/ \_/ \
\_/ \_/ \_/ \_/
/ \ / \_/ \ / \
\_/ \_/ \_/ \_/
/ \_/ \_/ \_/ \
\_/ \_/ \_/ \_/
/ \_ \_/ _/ \
/ \_/ \_/ \
/ \_/ \
/ \
There are 6 holes in this structure, in each 1 toothpick is missing, so a(8)=6.
CROSSREFS
For number of holes see A184408.
Sequence in context: A134413 A134201 A184408 * A137479 A304363 A247097
KEYWORD
nonn
AUTHOR
Olaf Voß, Jan 13 2011
STATUS
approved