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A134838 Triangle read by rows, n-th row = first n terms of an array formed by A051731 * A051731(transform). 1
1, 1, 2, 1, 1, 2, 1, 2, 1, 3, 1, 1, 1, 2, 1, 2, 2, 2, 1, 4, 1, 1, 1, 1, 1, 1, 2, 1, 2, 2, 2, 1, 4, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 3, 1, 2, 1, 4, 1, 1, 2, 1, 1, 2, 1, 1, 3, 1, 2, 1, 2, 2, 2, 1, 2, 1, 4 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row sums = sigma(n), A000203: (1, 3, 4, 7, 6, 12, 8, ...).

Right border = d(n), A000005: (1, 2, 2, 3, 2, 4, 2, 4, ...).

LINKS

Table of n, a(n) for n=1..67.

FORMULA

Given the transform A051731 * A051731(transform), extract the first n terms of each row to form the triangle.

EXAMPLE

First few rows of the array:

  1, 1, 1, 1, 1, 1, 1, ...

  1, 2, 1, 2, 1, 2, 1, ...

  1, 1, 2, 1, 1, 2, 1, ...

  1, 2, 1, 3, 1, 2, 1, ...

  1, 1, 1, 1, 2, 1, 1, ...

  1, 2, 2, 2, 1, 4, 1, ...

  ...

First few rows of the triangle:

  1;

  1, 2;

  1, 1, 2;

  1, 2, 1, 3;

  1, 1, 1, 1, 2;

  1, 2, 2, 2, 1, 4;

  1, 1, 1, 1, 1, 1, 2;

  1, 2, 1, 3, 1, 2, 1, 4;

  1, 1, 2, 1, 1, 2, 1, 1, 3;

  1, 2, 1, 2, 2, 2, 1, 2, 1, 4;

  ...

CROSSREFS

Cf. A051731, A000203, A000005.

Sequence in context: A084746 A128259 A051194 * A049843 A131374 A207409

Adjacent sequences:  A134835 A134836 A134837 * A134839 A134840 A134841

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Nov 12 2007

STATUS

approved

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Last modified August 15 20:16 EDT 2022. Contains 356148 sequences. (Running on oeis4.)