A075994 - OEIS

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A075994

Irregular triangle T(n,k) = floor(n/k) for k = 1, 2, ..., floor(n/2) for n>=2 and T(1,1)=1.

1, 2, 3, 4, 2, 5, 2, 6, 3, 2, 7, 3, 2, 8, 4, 2, 2, 9, 4, 3, 2, 10, 5, 3, 2, 2, 11, 5, 3, 2, 2, 12, 6, 4, 3, 2, 2, 13, 6, 4, 3, 2, 2, 14, 7, 4, 3, 2, 2, 2, 15, 7, 5, 3, 3, 2, 2, 16, 8, 5, 4, 3, 2, 2, 2, 17, 8, 5, 4, 3, 2, 2, 2, 18, 9, 6, 4, 3, 3, 2, 2, 2, 19, 9, 6, 4, 3, 3, 2, 2, 2, 20, 10, 6, 5, 4, 3

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

This triangle is obtained by deleting from A010766 all 1's except for the first.

Row sums: A075995.

LINKS

Table of n, a(n) for n=1..97.

EXAMPLE

Irregular triangle starts:

4 2

5 2