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A134577 A127170 * A127648. 6
1, 2, 2, 2, 0, 3, 3, 4, 0, 4, 2, 0, 0, 0, 5, 4, 4, 6, 0, 0, 6, 2, 0, 0, 0, 0, 0, 7, 4, 6, 0, 8, 0, 0, 0, 8, 3, 0, 6, 0, 0, 0, 0, 0, 9, 4, 4, 0, 0, 10, 0, 0, 0, 0, 10 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A007429: (1, 4, 5, 11, 7, 20, 9, 26,...). Left border = A000005: (1, 2, 2, 3, 2, 4, 2,...). A134577 * [1/1, 1/2, 1/3,...] = A007425: (1, 3, 3, 6, 3, 9, 3, 10,...). A134577 * [1, 2, 3,...] = A007433: (1, 6, 11, 27, 27, 66,...). A134577 * A000005 = A034761: (1, 6, 8, 23, 12, 48,...)

LINKS

Table of n, a(n) for n=1..55.

FORMULA

A127170 * A127648 = A051731^2 * A127648 = A051731 * A127093

EXAMPLE

First few rows of the triangle are:

1;

2, 2;

2, 0, 3;

3, 4, 0, 4;

2, 0, 0, 0, 5

4, 4, 6, 0, 0, 6;

2, 0, 0, 0, 0, 0, 7;

4, 6, 0, 8, 0, 0, 0, 8;

...

CROSSREFS

Cf. A051731, A127170, A127648, A127093, A007429, A127170, A007433, A034761.

Sequence in context: A071443 A013586 A071441 * A071442 A124759 A071295

Adjacent sequences:  A134574 A134575 A134576 * A134578 A134579 A134580

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Nov 02 2007

STATUS

approved

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Last modified May 12 02:06 EDT 2021. Contains 343808 sequences. (Running on oeis4.)