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A222181 Number of pentagons added at n-th stage to the structure of A222180. 4
0, 1, 5, 10, 10, 10, 20, 30, 20, 10, 20, 40, 40, 30, 50, 70, 40, 10, 20, 40, 60, 80 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
Essentially the first differences of A222180.
Also number of P-toothpicks added at n-th stage to the P-toothpick structure of A222180.
LINKS
FORMULA
a(n) = 10*A222173(n-2), n >= 3. - Omar E. Pol, Nov 24 2013
EXAMPLE
Apparently this is an irregular triangle:
0;
1;
5;
10,10;
10,20,30,20;
10,20,40,40,30,50,70,40;
10,20,40,60,80,...
CROSSREFS
Sequence in context: A135912 A200990 A040020 * A282172 A123337 A038671
KEYWORD
nonn,tabf,more
AUTHOR
Omar E. Pol, Mar 15 2013
STATUS
approved

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Last modified March 19 07:31 EDT 2024. Contains 370955 sequences. (Running on oeis4.)