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A367728
a(n) is the denominator of (R(n) - 1)/(n + 1), where R(n) is the digit reversal of n.
5
1, 1, 3, 2, 5, 3, 7, 4, 9, 5, 1, 6, 13, 7, 3, 8, 17, 9, 19, 2, 21, 2, 23, 24, 25, 26, 27, 28, 29, 30, 31, 8, 3, 17, 5, 9, 37, 19, 39, 10, 41, 42, 43, 4, 45, 46, 47, 48, 49, 50, 51, 26, 53, 27, 5, 28, 57, 29, 59, 30, 61, 62, 63, 64, 13, 6, 67, 68, 69, 14, 71, 9
OFFSET
0,3
LINKS
MATHEMATICA
a[n_]:=Denominator[(FromDigits[Reverse[IntegerDigits[n]]]-1)/(n+1)]; Array[a, 72, 0]
PROG
(PARI) a(n) = denominator((fromdigits(Vecrev(digits(n)))-1)/(n+1)); \\ Michel Marcus, Nov 28 2023
CROSSREFS
Cf. A004086, A367593, A367727 (numerator).
Sequence in context: A076605 A367727 A318516 * A194748 A323462 A030640
KEYWORD
nonn,base,easy,frac,look
AUTHOR
Stefano Spezia, Nov 28 2023
STATUS
approved