This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A208259 Numbers starting and ending with digit 1. 3
 1, 11, 101, 111, 121, 131, 141, 151, 161, 171, 181, 191, 1001, 1011, 1021, 1031, 1041, 1051, 1061, 1071, 1081, 1091, 1101, 1111, 1121, 1131, 1141, 1151, 1161, 1171, 1181, 1191, 1201, 1211, 1221, 1231, 1241, 1251, 1261, 1271, 1281, 1291, 1301, 1311, 1321, 1331 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Union of A062332 and A208260. Supersequence of A208262 (numbers with all divisors starting and ending with digit 1). LINKS MATHEMATICA Select[Range[2000], First[IntegerDigits[#]] == 1 && Last[IntegerDigits[#]] == 1 &] (* From Vladimir Joseph Stephan Orlovsky, Feb 26 2012 *) CROSSREFS Cf. A062332 (primes starting and ending with a digit 1), A208260 (nonprime numbers starting and ending with a digit 1). Sequence in context: A043494 A038444 A115824 * A043036 A072001 A099821 Adjacent sequences:  A208256 A208257 A208258 * A208260 A208261 A208262 KEYWORD nonn,base AUTHOR Jaroslav Krizek, Feb 24 2012 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .