A077210 -id:A077210 - cp's OEIS frontend

A078211 Smallest multiple of n^2 beginning and ending in n, or 0 if no such multiple exists.

1, 212, 333, 464, 525, 6156, 7007, 8128, 9639, 0, 11011, 122112, 13013, 0, 0, 162816, 1720417, 0, 1905719, 0, 212121, 0, 2320723, 244224, 25625, 0, 2743227, 287728, 2917429, 0, 3143431, 325632, 3372633, 0, 0, 3617136, 373737, 0, 393939, 0, 4136941

Offset: 1

Amarnath Murthy, Nov 22 2002

Cf. A078208, A077209, A077210, A078212.

{ a(n) = local(l,m); l=#Str(n); m=valuation(n,2); if(m>0 && m0 && mMax Alekseyev, Oct 18 2008

a(11) and up from Max Alekseyev, Oct 18 2008

A078212 Smallest multiple of the n-th prime beginning and ending in n with a(1)=a(3)=0.

Original entry on oeis.org

0, 222, 0, 434, 55, 676, 7157, 8018, 989, 101210, 11811, 121212, 130913, 141814, 152515, 162816, 174817, 185318, 191419, 200220, 210021, 222622, 23323, 241724, 254625, 2626, 279027, 289328, 292229, 306230, 311531, 323832, 330033, 348334

Offset: 1

Amarnath Murthy, Nov 22 2002

Cf. A078208, A077209, A077210, A078211.

More terms from David W. Wilson, Jan 17 2006

cp's OEIS Frontend

A078211 Smallest multiple of n^2 beginning and ending in n, or 0 if no such multiple exists.

Views

Author

Keywords

Crossrefs

Programs