A132981 Equal sides of isosceles Heronian triangles, ordered.

5, 5, 13, 13, 17, 17, 25, 25, 29, 29, 37, 37, 41, 41, 53, 53, 61, 61, 65, 65, 65, 65, 73, 73, 85, 85, 85, 85, 89, 89, 97, 97, 101, 101, 109, 109, 113, 113, 125, 125, 137, 137, 145, 145, 145, 145, 149, 149, 157, 157, 169, 169, 173, 173, 181, 181, 185, 185, 185, 185

Offset

1,1

Links

Table of n, a(n) for n=1..60.

Formula

Entries of A020882 doubled.

Example

Entries 65,65,65,65, refer to the isosceles Heronian triangles (65,65,66),(66,65,112),(65,65,32),(65,65,126) the first two with common area 1848 and the last two with common area 1008.

Crossrefs

Cf. A120644.

Sequence in context: A055526 A146984 A055524 * A168392 A147280 A147494

Adjacent sequences: A132978 A132979 A132980 * A132982 A132983 A132984

Keyword

nonn

Author

Lekraj Beedassy, Nov 19 2007

Status

approved