A177137 a(n) is the largest n-digit bemirp (A048895).

1901, 19001, 198901, 1909081, 19986091, 199800091, 1999880101, 19999919011, 199999069901, 1999998661891, 19999999196861, 199999990066801, 1999999999899101, 19999999999898161, 199999999998806191, 1999999999999988911, 19999999999998191191, 199999999999986661691

Offset

4,1

Links

Table of n, a(n) for n=4..21.

Example

a(7) = 1909081 is the last among 7-digit emirp pairs (1909081, 1809091) which rotated through 180 degrees forms another emirp pair (1806061, 1606081).

Crossrefs

Cf. A048895, A177136.

Sequence in context: A251346 A078862 A190652 * A273913 A190651 A237787

Adjacent sequences: A177134 A177135 A177136 * A177138 A177139 A177140

Keyword

nonn,base

Author

Lekraj Beedassy, May 03 2010

Extensions

More terms from Giovanni Resta, Aug 14 2019

Status

approved