A147847 Concerning hypotenuses of triangles such that the sum of the two legs is a perfect square.

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

Offset

0,1

Comments

The sequence of b's considered in A145906.

A094192 is apparently derived by sorting into natural order.

Links

Table of n, a(n) for n=0..62.

M. de Frenicle, Methode pour trouver la solutions des problemes par les exclusions, in: Divers ouvrages de mathematiques et de physique par messieurs de l'academie royale des sciences, (1693) pp 1-44, table on page 31.

Example

(a,b,c,d,e,f,g,h) = (1,2,1,3,1,5,4,9) with N=7 or (1,3,2,5,7,13,6,19) with N=17 or (3,4,1,5,7,17,10,27) with N=23 or (1,4,3,7,17,25,8,33) with N=31.

Crossrefs

Cf. A143732.

Sequence in context: A125568 A248110 A108872 * A370386 A335572 A268680

Adjacent sequences: A147844 A147845 A147846 * A147848 A147849 A147850

Keyword

nonn,uned,obsc

Author

Paul Curtz, Nov 15 2008

Status

approved