A155544 Indices of primes having three or more identical digits.

187, 190, 193, 194, 240, 275, 280, 303, 318, 331, 345, 404, 430, 466, 468, 470, 471, 476, 481, 494, 521, 532, 566, 603, 604, 669, 706, 733, 859, 917, 935, 946, 962, 979, 981, 984, 995, 1020, 1107, 1117, 1140, 1224, 1227, 1230, 1231, 1242, 1245, 1246, 1251, 1253, 1268

Offset: 1

Author

Juri-Stepan Gerasimov, Jan 24 2009

Keywords

• nonn
• base

Examples

			946 is in the sequence because prime(946) = 7477 has three identical digits.
		

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A000040, A073069.

Programs

Mathematica

Select[Range[1300],Max[DigitCount[Prime[#]]]>2&] (* Harvey P. Dale, Mar 08 2013 *)

Extensions

Edited by N. J. A. Sloane, Jan 30 2009

Definition corrected, 859, 946, 962, 979 inserted by R. J. Mathar, May 15 2010