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A187883 Triangle by rows, A003983 * A000012 as infinite lower triangular matrices 0
1, 2, 1, 4, 3, 1, 6, 5, 3, 1, 9, 8, 6, 3, 1, 12, 11, 9, 6, 3, 1, 16, 15, 13, 10, 6, 3, 1, 20, 19, 17, 14, 10, 6, 3, 1, 25, 24, 22, 19, 15, 10, 6, 3, 1, 30, 29, 27, 24, 20, 15, 10, 6, 3, 1, 36, 35, 33, 30, 26, 21, 15, 10, 6, 3, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Sum of n-th row terms = A034828(n+1).

LINKS

Table of n, a(n) for n=1..66.

FORMULA

Given the correlation triangle A003983, partial sums of terms starting from the right.

EXAMPLE

Row 4 = (6, 5, 3, 1), since row 4 of the A003983 triangle = (1, 2, 2, 1).

First few rows of the triangle =

1

2, 1

4, 3, 1

6, 5, 3, 1

9, 8, 6, 3, 1

12, 11, 9, 6, 3, 1

16, 15, 13, 10, 6, 3, 1

20, 19, 17, 14, 10, 6, 3, 1

25, 24, 22, 19, 15, 10, 6, 3, 1

30, 29, 27, 24, 20, 15, 10, 6, 3, 1

36, 35, 33, 30, 26, 21, 15, 10, 6, 3, 1

42, 41, 39, 36, 32, 27, 21, 15, 10, 6, 3, 1

...

CROSSREFS

Cf. A034828

Sequence in context: A112157 A265624 A093682 * A134543 A305540 A197871

Adjacent sequences:  A187880 A187881 A187882 * A187884 A187885 A187886

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Mar 15 2011

STATUS

approved

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Last modified October 20 20:24 EDT 2019. Contains 328273 sequences. (Running on oeis4.)