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A366963
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Numbers whose difference between the largest and smallest digits is equal to 6.
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9
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17, 28, 39, 60, 71, 82, 93, 106, 117, 127, 137, 147, 157, 160, 167, 171, 172, 173, 174, 175, 176, 177, 206, 217, 228, 238, 248, 258, 260, 268, 271, 278, 282, 283, 284, 285, 286, 287, 288, 306, 317, 328, 339, 349, 359, 360, 369, 371, 379, 382, 389, 393, 394, 395, 396, 397, 398, 399
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OFFSET
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1,1
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COMMENTS
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The number of n-digit terms of this sequence is 27*7^(n-1) - 47*6^(n-1) + 4*5^n.
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LINKS
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MATHEMATICA
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Select[Range[400], Max[d=IntegerDigits[#]]-Min[d]==6 &]
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PROG
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(Python)
def ok(n): return max(d:=list(map(int, str(n))))-min(d) == 6
(PARI) isok(n) = my(d=digits(n)); vecmax(d) - vecmin(d) == 6; \\ Michel Marcus, Nov 05 2023
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CROSSREFS
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KEYWORD
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nonn,base,easy
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AUTHOR
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STATUS
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approved
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