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A222177
Number of pentagons added at n-th stage to the structure of A222176.
3
0, 1, 2, 2, 2, 4, 6, 4, 2, 4, 8, 8, 6, 10, 14, 8, 2, 4, 8, 12, 16
OFFSET
0,3
COMMENTS
Essentially the first differences of A222176.
Also number of P-toothpicks added at n-th stage to the P-toothpick structure of A222176.
First differs from A152968 at a(10).
FORMULA
a(n) = A222181(n+1)/5, n >= 1.
EXAMPLE
Apparently this is an irregular triangle:
0;
1;
2, 2;
2, 4, 6, 4;
2, 4, 8, 8, 6, 10, 14, 8;
2, 4, 8, 12, 16,...
CROSSREFS
KEYWORD
nonn,tabf,more
AUTHOR
Omar E. Pol, Mar 21 2013
STATUS
approved