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A104715 Triangle T(n,k) = (2*k-1)*A000217(n-k+1) read by rows, 1<=k<=n. 1
1, 3, 3, 6, 9, 5, 10, 18, 15, 7, 15, 30, 30, 21, 9, 21, 45, 50, 42, 27, 11, 28, 63, 75, 70, 54, 33, 13, 36, 84, 105, 105, 90, 66, 39, 15, 45, 108, 140, 147, 135, 110, 78, 45, 17, 55, 135, 180, 196, 189, 165, 130, 90, 51, 19, 66, 165 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..57.

EXAMPLE

First few rows are:

1;

3, 3;

6, 9, 5;

10, 18, 15, 7;

15, 30, 30, 21, 9;

21, 45, 50, 42, 27, 11;

...

CROSSREFS

Cf. A002415 (row sums), A104716.

Sequence in context: A026804 A240213 A205970 * A164743 A110769 A093445

Adjacent sequences:  A104712 A104713 A104714 * A104716 A104717 A104718

KEYWORD

nonn,tabl,easy

AUTHOR

Gary W. Adamson, Mar 20 2005

EXTENSIONS

One term corrected by R. J. Mathar, Oct 29 2011

STATUS

approved

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Last modified June 22 16:32 EDT 2021. Contains 345386 sequences. (Running on oeis4.)