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A047739 Economical palindromes. 0
343, 1331, 10201, 14641, 31213, 94249, 1030301, 1332331, 1367631, 1478741, 2060602, 2513152, 2551552, 2570752, 2939392, 2977792, 3090903, 3498943, 3637363, 3735373, 3850583, 5221225, 5265625, 5734375, 6948496, 11288211, 11333311, 12100121, 12499421, 13577531, 14655641, 22666622, 27700772, 29399392, 31244213, 33999933, 38988983, 58344385, 71111117, 100020001, 100585001, 101000101, 104060401, 104555401, 106878601 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

EXAMPLE

343 = 7^3; 3 digits in 343, 2 digits in 7^3, so 343 is economical.

CROSSREFS

Cf. A046759.

Sequence in context: A117689 A178374 A179147 * A052084 A075546 A167733

Adjacent sequences:  A047736 A047737 A047738 * A047740 A047741 A047742

KEYWORD

nonn,base

AUTHOR

Carlos B. Rivera (crivera(AT)primepuzzles.net)

EXTENSIONS

a(11)-a(45) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Nov 24 2010

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Last modified February 17 21:13 EST 2012. Contains 206085 sequences.