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A366962
Numbers whose difference between the largest and smallest digits is equal to 5.
9
16, 27, 38, 49, 50, 61, 72, 83, 94, 105, 116, 126, 136, 146, 150, 156, 161, 162, 163, 164, 165, 166, 205, 216, 227, 237, 247, 250, 257, 261, 267, 272, 273, 274, 275, 276, 277, 305, 316, 327, 338, 348, 350, 358, 361, 368, 372, 378, 383, 384, 385, 386, 387, 388
OFFSET
1,1
COMMENTS
The number of n-digit terms of this sequence is 29*6^(n-1) - 49*5^(n-1) + 5*4^n.
MATHEMATICA
Select[Range[400], Max[d=IntegerDigits[#]]-Min[d]==5 &]
PROG
(Python)
def ok(n): return max(d:=list(map(int, str(n))))-min(d) == 5
print([k for k in range(400) if ok(k)]) # Michael S. Branicky, Oct 30 2023
(PARI) isok(n) = my(d=digits(n)); vecmax(d) - vecmin(d) == 5; \\ Michel Marcus, Nov 05 2023
CROSSREFS
Cf. A037904.
Cf. A010785 (difference = 0), A366958 (difference = 1), A366959 (difference = 2), A366960 (difference = 3), A366961 (difference = 4), A366963 (difference = 6), A366964 (difference = 7), A366965 (difference = 8), A366966 (difference = 9).
Sequence in context: A374007 A118642 A088247 * A032610 A286429 A329206
KEYWORD
nonn,base,easy
AUTHOR
Stefano Spezia, Oct 30 2023
STATUS
approved