

A080604


Triangular array of hypotenuses of right triangles with integer legs: T(n,k) = round(sqrt(n^2 + k^2)), 1 <= k <= n.


0



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

1,2


COMMENTS

T(n,n) = A022846(n).


LINKS

Table of n, a(n) for n=1..81.


EXAMPLE

Triangle begins:
1;
2, 3;
3, 4, 4;
4, 4, 5, 6;
5, 5, 6, 6, 7;
6, 6, 7, 7, 8, 8;
7, 7, 8, 8, 9, 9, 10;
...


CROSSREFS

Sequence in context: A061775 A225634 A247134 * A221983 A029118 A129382
Adjacent sequences: A080601 A080602 A080603 * A080605 A080606 A080607


KEYWORD

nonn,tabl


AUTHOR

Reinhard Zumkeller, Feb 25 2003


STATUS

approved



