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A134542 A134541 * A000012. 3
1, 1, 1, 1, 2, 1, 1, 2, 2, 1, 1, 3, 3, 2, 1, 1, 2, 3, 3, 2, 1, 1, 3, 4, 4, 3, 2, 1, 1, 3, 4, 4, 4, 3, 2, 1, 1, 3, 4, 5, 5, 4, 3, 2, 1, 1, 2, 4, 5, 5, 5, 4, 3, 2, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

Row sums = A002088: (1, 2, 4, 6, 10, 12, 18, 22,...). A134542 * [1,2,3,...] = A015631: (1, 3, 8, 15, 29, 42,...).

LINKS

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

FORMULA

A134541 * A000012 as infinite lower triangular matrices. Triangle read by rows, partial sums of A134541 terms starting from the right.

EXAMPLE

First few rows of the triangle are:

1;

1, 1;

1, 2, 1;

1, 2, 2, 1;

1, 3, 3, 2, 1;

1, 2, 3, 3, 2, 1;

1, 3, 4, 4, 3, 2, 1;

1, 3, 4, 4, 4, 3, 2, 1;

1, 3, 4, 5, 5, 4, 3, 2, 1;

1, 2, 4, 5, 5, 5, 4, 3, 2, 1;

...

CROSSREFS

Cf. A134541, A002088, A015631.

Sequence in context: A301608 A285521 A187451 * A106254 A117147 A111007

Adjacent sequences:  A134539 A134540 A134541 * A134543 A134544 A134545

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Oct 31 2007

STATUS

approved

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Last modified February 18 15:30 EST 2020. Contains 332019 sequences. (Running on oeis4.)