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A178067 Triangle read by rows, A000027 * A000012 1
1, 5, 3, 15, 11, 6, 34, 27, 19, 10, 65, 54, 42, 29, 15, 111, 95, 78, 60, 41, 21, 175, 153, 130, 106, 81, 55, 28, 260, 231, 201, 170, 138, 105, 71, 36 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A132117: (1, 8, 32, 90, 205, 406,...).

The operation takes partial sums of the A000027 triangle rows, from the right.

Left border = A006003

LINKS

Table of n, a(n) for n=1..36.

FORMULA

As infinite lower triangular matrices, A000027 * A000012 (the all 1's triangle).

EXAMPLE

First few rows of the triangle =

1;

5, 3;

15, 11, 6;

34, 27, 19, 10;

65, 54, 42, 29, 15;

111, 95, 78, 60, 41, 21;

175, 153, 130, 106, 81, 55, 28;

260, 231, 201, 170, 138, 105, 71, 36;

369, 332, 294, 255, 215, 174, 132, 89, 45;

505, 459, 412, 364, 315, 265, 214, 162, 109, 55;

671, 615, 558, 500, 441, 381, 320, 258, 195, 131, 66;

...

Example: Row 3 = (15, 11 6) since row 3 of triangle A000027 = (4, 5, 6);

then taking partial sums from the right.

CROSSREFS

Cf. A000027, A132117

Sequence in context: A166465 A146934 A213762 * A213548 A246204 A185733

Adjacent sequences:  A178064 A178065 A178066 * A178068 A178069 A178070

KEYWORD

nonn,tabl,easy

AUTHOR

Gary W. Adamson, May 18 2010

STATUS

approved

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Last modified May 23 13:25 EDT 2019. Contains 323514 sequences. (Running on oeis4.)