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A137629 Triangle read by rows, A026794^2. 2
1, 2, 1, 4, 0, 1, 7, 2, 0, 1, 11, 2, 0, 0, 1, 18, 4, 2, 0, 0, 1, 26, 4, 2, 0, 0, 0, 1, 39, 9, 2, 2, 0, 0, 0, 1, 55, 9, 4, 2, 0, 0, 0, 0, 1, 79, 16, 4, 2, 2, 0, 0, 0, 0, 1, 106, 18, 6, 2, 2, 0, 0, 0, 0, 0, 1, 150, 29, 9, 4, 2, 2, 0, 0, 0, 0, 0, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A137630: (1, 3, 5, 10, 14, 25, 33, 53, 71, 104,...). Left border = A137631: (1, 2, 4, 7, 11, 18, 26, 39, 55, 79,...).

LINKS

Table of n, a(n) for n=1..78.

FORMULA

Square of the partition triangle

EXAMPLE

First few rows of the triangle are:

1;

2, 1;

4, 0, 1;

7, 2, 0, 1;

11, 2, 0, 0, 1;

18, 4, 2, 0, 0, 1;

26, 4, 2, 0, 0, 0, 1;

39, 9, 2, 2, 0, 0, 0, 1;

...

CROSSREFS

Cf. A016794, A137630, A137631.

Sequence in context: A122141 A091604 A200192 * A220504 A087569 A048614

Adjacent sequences:  A137626 A137627 A137628 * A137630 A137631 A137632

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Jan 31 2008

STATUS

approved

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Last modified September 27 12:30 EDT 2020. Contains 337380 sequences. (Running on oeis4.)