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A145973 Triangle read by rows, square of A053121. 3
1, 0, 1, 2, 0, 1, 0, 4, 0, 1, 7, 0, 6, 0, 1, 0, 18, 0, 8, 0, 1, 29, 0, 33, 0, 10, 0, 1, 0, 86, 0, 52, 0, 12, 0, 1, 131, 0, 179, 0, 75, 0, 14, 0, 1, 0, 427, 0, 316, 0, 102, 0, 16, 0, 1, 625, 0, 972, 0, 505, 0, 133, 0, 18, 0, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

Left border = aerated version of A007852.

LINKS

Table of n, a(n) for n=0..65.

FORMULA

Triangle read by rows, A053121^2.

EXAMPLE

First few rows of the triangle:

    1;

    0,   1;

    2,   0,   1;

    0,   4,   0,   1;

    7,   0,   6,   0,   1;

    0,  18,   0,   8,   0,   1;

   29,   0,  33,   0,  10,   0,   1;

    0,  86,   0,  52,   0,  12,   0,   1;

  131,   0, 179,   0,  75,   0,  14,   0,   1;

    0, 427,   0, 316,   0, 102,   0,  16,   0,   1;

  625,   0, 972,   0, 505,   0, 133,   0,  18,   0,   1;

  ...

MAPLE

A145973 := proc(n, k)

    add(A053121(n, j)*A053121(j, k), j=k..n) ;

end proc: # R. J. Mathar, Mar 03 2013

CROSSREFS

Cf. A053121.

Cf. A007852, A145974 (row sums).

This triangle is the square of A053121.

Sequence in context: A131321 A111959 A110109 * A155761 A067631 A134317

Adjacent sequences:  A145970 A145971 A145972 * A145974 A145975 A145976

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson and Roger L. Bagula, Oct 25 2008

STATUS

approved

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Last modified October 24 05:38 EDT 2021. Contains 348217 sequences. (Running on oeis4.)