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A316869
Number of times 8 appears in decimal expansion of n.
8
0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0
OFFSET
0,89
EXAMPLE
a(0) = 0 since the decimal representation of 0 does not contain the digit 8.
a(8) = 1 since 8 appears once in the decimal expansion of 8.
MATHEMATICA
Array[ DigitCount[#, 10, 8] &, 105, 0]
PROG
(PARI) a(n) = #select(x->x==8, digits(n)); \\ Michel Marcus, Jul 20 2018
KEYWORD
base,easy,nonn
AUTHOR
Robert G. Wilson v, Jul 15 2018
STATUS
approved