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A280648 Numbers k such that k^3 has an odd number of digits and the middle digit is 8. 3
2, 24, 35, 38, 120, 127, 131, 138, 145, 172, 174, 182, 183, 208, 212, 215, 471, 481, 482, 485, 495, 505, 516, 517, 544, 551, 567, 594, 601, 610, 617, 621, 644, 646, 674, 677, 689, 736, 739, 749, 756, 768, 773, 774, 775, 776, 786, 799, 803, 812, 821, 830, 835 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The sequence of cubes starts: 8, 13824, 42875, 54872, 1728000, 2048383, 2248091, 2628072, ...

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

2^3 = (8), 172^3 = 508(8)448, 610^3 = 2269(8)1000.

CROSSREFS

Cf. A280640-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: A212759 A112660 A330526 * A119066 A019996 A119070

Adjacent sequences:  A280645 A280646 A280647 * A280649 A280650 A280651

KEYWORD

nonn,base,easy

AUTHOR

Lars Blomberg, Jan 07 2017

STATUS

approved

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Last modified October 31 05:06 EDT 2020. Contains 338098 sequences. (Running on oeis4.)