A097616 Values of n such that the first decimal digits of {2^n, ..., 9^n} form a prime number when concatenated.

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

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