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A280646 Numbers k such that k^3 has an odd number of digits and the middle digit is 6. 3
22, 25, 27, 36, 37, 124, 129, 134, 147, 156, 160, 169, 469, 497, 503, 527, 532, 540, 547, 548, 549, 565, 571, 587, 602, 609, 652, 670, 672, 678, 688, 698, 713, 716, 722, 735, 741, 746, 751, 754, 755, 789, 794, 797, 798, 805, 813, 820, 828, 849, 866, 883, 887 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The sequence of cubes starts: 10648, 15625, 19683, 46656, 50653, 1906624, 2146689, 2406104, ...

LINKS

Lars Blomberg, Table of n, a(n) for n = 1..10000

Jeremy Gardiner, Middle digit in cube numbers, Seqfan Mailing list, Dec 12 2016.

EXAMPLE

22^3 = 10(6)48, 156^3 = 379(6)416, 678^3 = 3116(6)5752

CROSSREFS

Cf. A280640-A280645, A280647-A280649, A181354.

See A279420-A279429 for a k^2 version.

See A279430-A279431 for a k^2 version in base 2.

Sequence in context: A061371 A254753 A070809 * A295799 A322124 A178423

Adjacent sequences:  A280643 A280644 A280645 * A280647 A280648 A280649

KEYWORD

nonn,base,easy

AUTHOR

Lars Blomberg, Jan 07 2017

STATUS

approved

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Last modified August 15 11:57 EDT 2020. Contains 336492 sequences. (Running on oeis4.)