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 A269244 Number of times the digit 4 appears in the decimal expansion of n^3. 12
 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 2, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 1, 1, 0, 2, 0, 1, 0, 1, 0, 2, 1, 1, 1, 2, 1, 0, 2, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,15 COMMENTS The cubes corresponding to the first occurrence of 1, 2, 3, ... are listed in A036531, i.e., A036531(n)^(1/3) = A048369(n) is the index of the first occurrence of n. LINKS EXAMPLE 0^3 = 0, 1^3 = 1, 2^3 = 8 and 3^3 = 27 all have a(0) = a(1) = a(2) = a(3) = 0 digits '4'. 4^3 = 64 has a(4) = 1 digit '4'. 14^3 = 2744 has a(14) = 2 digits '4'. MATHEMATICA Table[DigitCount[n^3, 10, 4], {n, 0, 100}] (* Robert Price, Mar 21 2020 *) PROG (PARI) A269244(n)=#select(t->t==4, digits(n^3)) CROSSREFS Cf. A036531 and A036527 - A036536; A048369 and A048365 - A048374. Analog for the other digits 0, 1, ..., 9: A269250, A269241, A269242, A269243, A269244, A269245, A269246, A269247, A269248, A269249. Analog for squares: A086012 (digit 4), and A086008 - A086017 for digits 0 - 9. Sequence in context: A231366 A158924 A025426 * A204246 A053200 A050870 Adjacent sequences:  A269241 A269242 A269243 * A269245 A269246 A269247 KEYWORD nonn,base AUTHOR M. F. Hasler, Feb 20 2016 STATUS approved

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Last modified September 17 14:07 EDT 2021. Contains 347478 sequences. (Running on oeis4.)