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A256257
6 times numbers of Gould's sequence A001316.
2
6, 12, 12, 24, 12, 24, 24, 48, 12, 24, 24, 48, 24, 48, 48, 96, 12, 24, 24, 48, 24, 48, 48, 96, 24, 48, 48, 96, 48, 96, 96, 192, 12, 24, 24, 48, 24, 48, 48, 96, 24, 48, 48, 96, 48, 96, 96, 192, 24, 48, 48, 96, 48, 96, 96, 192, 48, 96, 96, 192, 96, 192, 192, 384, 12, 24, 24, 48, 24, 48, 48, 96, 24, 48, 48, 96, 48, 96, 96, 192
OFFSET
0,1
COMMENTS
Also, number of triangular cells turned ON at (n+1)-st stage in the structure of A256256.
First differences of A256256.
FORMULA
a(n) = 6*A001316(n) = 3*A117973(n) = 2*A160713(n).
a(n) = 12*A048896(n-1), n >= 1.
EXAMPLE
Written as an irregular triangle in which the row lengths are the terms of A011782, the sequence begins:
6;
12;
12, 24;
12, 24, 24, 48;
12, 24, 24, 48, 24, 48, 48, 96;
12, 24, 24, 48, 24, 48, 48, 96, 24, 48, 48, 96, 48, 96, 96, 192;
...
KEYWORD
nonn,tabf
AUTHOR
Omar E. Pol, Mar 20 2015
STATUS
approved