Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A157173
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A157173 Primes with sum of smallest digit and final digit is a prime. +0
2
11, 23, 29, 31, 41, 47, 61, 67, 71, 89, 103, 107, 131, 151, 181, 191, 211, 223, 229, 233, 239, 241, 251, 263, 269, 271, 281, 283, 293, 307, 311, 331, 421, 431, 449, 457, 461, 467, 479, 487, 491, 499, 503, 521, 523, 541, 547, 571, 607, 631, 641, 647, 661, 677 (list; graph; listen)
OFFSET

1,1

EXAMPLE

11(1+1=2=prime), 23(2+3=5=prime), 29(2+9=11=prime), 31(1+1=2=prime), etc.

CROSSREFS

Cf. A000040.

Sequence in context: A143584 A061752 A122259 this_sequence A090423 A086102 A058340

Adjacent sequences: A157170 A157171 A157172 this_sequence A157174 A157175 A157176

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Feb 24 2009

EXTENSIONS

Second 151 replaced by 251, 643 removed by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 26 2009

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


AT&T Labs Research