The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A097616 Values of n such that the first decimal digits of {2^n, ..., 9^n} form a prime number when concatenated. 2
 1, 11, 21, 44, 55, 81, 90, 118, 126, 134, 147, 152, 171, 178, 184, 199, 262, 273, 279, 300, 326, 345, 346, 361, 365, 389, 394, 415, 418, 433, 436, 440, 448, 453, 455, 498, 525, 534, 541, 547, 563, 578, 586, 591, 609, 610, 623, 632, 643, 644, 651, 655, 658 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Rick L. Shepherd, Table of n, a(n) for n = 1..10000 Eric Weisstein's World of Mathematics, Gelfand's Question J. Eising, D. Radcliffe, and J. Top. A Simple Answer to Gelfand’s Question. American Mathematical Monthly 122:3 (2015), 234-245. CROSSREFS Cf. A097617. Sequence in context: A129638 A333356 A127624 * A146150 A244069 A058489 Adjacent sequences: A097613 A097614 A097615 * A097617 A097618 A097619 KEYWORD nonn,base AUTHOR Eric W. Weisstein, Aug 16 2004 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 2 19:59 EST 2022. Contains 358510 sequences. (Running on oeis4.)