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A131431
3n + 1 preceded by n zeros.
1
1, 0, 4, 0, 0, 7, 0, 0, 0, 10, 0, 0, 0, 0, 13, 0, 0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 19, 0, 0, 0, 0, 0, 0, 0, 22, 0, 0, 0, 0, 0, 0, 0, 0, 25, 0, 0, 0, 0, 0, 0, 0, 0, 0, 28, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 31, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 34, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 37
OFFSET
0,3
FORMULA
A016777 as the diagonal of an infinite lower triangular matrix with the rest zeros.
EXAMPLE
First few rows of the triangle are:
1;
0, 4;
0, 0, 7;
0, 0, 0, 10;
0, 0, 0, 0, 13;
...
MAPLE
ListTools[Flatten]([seq([seq(0, k=1..n), 3*n+1], n=0..12)]); # Georg Fischer, Oct 02 2021
CROSSREFS
Sequence in context: A341795 A063730 A355945 * A240664 A255328 A321433
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Jul 10 2007
EXTENSIONS
a(35) corrected and more terms from Georg Fischer, Oct 02 2021
STATUS
approved