A099181 Primes p which are greater than twice p reversed.

31, 41, 61, 71, 83, 311, 331, 401, 421, 431, 461, 491, 521, 541, 571, 601, 631, 641, 661, 691, 701, 733, 743, 751, 761, 773, 811, 821, 823, 853, 863, 881, 883, 911, 941, 953, 971, 983, 991, 2311, 2411, 2521, 2621, 2711, 2801, 3001, 3011, 3041, 3121, 3221

Offset

1,1

Links

Table of n, a(n) for n=1..50.

Erich Friedman, What's Special About This Number?.

Example

31 is in the sequence since 31 > 2*13.

Mathematica

Select[ Prime[ Range[ 460]], # > 2FromDigits[ Reverse[ IntegerDigits[ # ]]] &]

Crossrefs

Sequence in context: A098711 A087053 A159045 * A040989 A040969 A348558

Adjacent sequences: A099178 A099179 A099180 * A099182 A099183 A099184

Keyword

base,nonn

Author

Robert G. Wilson v, Oct 01 2004

Status

approved