

A222181


Number of pentagons added at nth 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
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OFFSET

0,3


COMMENTS

Essentially the first differences of A222180.
Also number of Ptoothpicks added at nth stage to the Ptoothpick structure of A222180.


LINKS



FORMULA



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

Cf. A139250, A139251, A147582, A151724, A152968, A161645, A182633, A182841, A222173, A222177, A222180.


KEYWORD

nonn,tabf,more


AUTHOR



STATUS

approved



