[seqfan] A175696: No solns for n>=69(?)

[zak seidov]

A175696: No solns for n>=69(?)

For n=1..68 we get:
{1,1359},{2,774},
{3,45},{4,3},
{5,279},{6,693},
{7,1},{8,315},
{9,18},{10,15},
{11,261},{12,18},
{13,495},{14,17982},
{15,2475},{16,37},
{17,189},{18,3519},
{19,249},{20,3861},
{21,3393},{22,42},
{23,225},{24,4113},
{25,37},{26,22581},
{27,234},{28,2826},
{29,2385},{30,2439},
{31,165},{32,1791},
{33,27},{34,15},
{35,24975},{36,17838},
{37,1668},{38,2556},
{39,15129},{40,1728},
{41,146655},{42,198},
{43,14928},{44,162081},
{45,146952},{46,17829},
{47,18324},{48,167004},
{49,15369},{50,14625},
{51,14751},{52,1556},
{53,17217},{54,150975},
{55,15402},{56,16281},
{57,144036},{58,156852},
{59,161379},{60,152703},
{61,14985},{62,146907},
{63,1557},{64,154707},
{63,1557},{64,154707},
{65,1480356},{66,1471248},
{67,1429851},{68,1435428}
It seems that that there is no solution for n>=69 (?)
Zak