|
Search: id:A155560
|
|
| |
|
| 13, 37, 52, 61, 73, 97, 100, 109, 117, 148, 157, 169, 181, 193, 208, 229, 241, 244, 277, 292, 313, 325, 333, 337, 349, 373, 388, 397, 400, 409, 421, 433, 436, 457, 468, 481, 541, 549, 577, 592, 601, 613, 628, 637, 657, 661, 673, 676, 709, 724, 733, 757, 769
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
EXAMPLE
|
a(1)=13 is the least number that can be written as A+B and C+3D where A,B,C,D are positive squares (namely 13 = 2^2 + 3^2 = 1^2 + 3*2^2).
a(2)=37 is the second smallest number which figures in A000404 and in A092572 as well.
|
|
PROGRAM
|
(PARI) isA155560(n /* omit optional 2nd arg for the present sequence */, c=[3, 1]) = { for(i=1, #c, for(b=1, sqrtint((n-1)\c[i]), issquare(n-c[i]*b^2)&next(2)); return); 1}
for( n=1, 10^3, isA155560(n) & print1(n", "))
|
|
CROSSREFS
|
Sequence in context: A088963 A063913 A119705 this_sequence A045809 A140112 A089030
Adjacent sequences: A155557 A155558 A155559 this_sequence A155561 A155562 A155563
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
M. F. Hasler (MHasler(AT)univ-ag.fr), Jan 24 2009
|
|
|
Search completed in 0.002 seconds
|
