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A295022 Cubes whose largest digit is 7. 5
27, 2744, 3375, 12167, 17576, 27000, 157464, 166375, 175616, 250047, 274625, 300763, 474552, 753571, 1157625, 1367631, 1771561, 2000376, 2352637, 2460375, 2571353, 2744000, 3176523, 3375000, 4330747, 4657463, 4741632, 5177717, 5451776, 6644672, 7645373, 11543176, 12167000 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
For any term a(n), all numbers of the form a(n)*10^3k, k >= 0, are in this sequence. We could call "primitive" the terms not of this form, i.e., those without trailing '0'.
LINKS
FORMULA
a(n) = A294997(n)^3.
EXAMPLE
27 is in the sequence because it is a cube, 27 = 3^3, and its largest digit is 7.
PROG
(PARI) for(n=1, 250, vecmax(digits(n^3))==7 &&print1(n^3, ", "))
CROSSREFS
Cf. A294997 (the corresponding cube roots); A278936, A294663, A295025, A295021, A295023, A295024 (same for digit 3 .. 9); A295017 (same for squares).
Cf. A000578 (the cubes).
Sequence in context: A287228 A086206 A323314 * A017427 A050644 A048567
KEYWORD
nonn,base
AUTHOR
M. F. Hasler, Nov 13 2017
STATUS
approved

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Last modified June 19 14:12 EDT 2024. Contains 373503 sequences. (Running on oeis4.)