

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
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OFFSET

1,2


COMMENTS

Sum of nth 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: A335259 A093682 A344767 * A134543 A305540 A197871
Adjacent sequences: A187880 A187881 A187882 * A187884 A187885 A187886


KEYWORD

nonn,tabl


AUTHOR

Gary W. Adamson, Mar 15 2011


STATUS

approved



