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 A002994 Initial digit of cubes. (Formerly M4468) 12
 0, 1, 8, 2, 6, 1, 2, 3, 5, 7, 1, 1, 1, 2, 2, 3, 4, 4, 5, 6, 8, 9, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 4, 4, 5, 5, 5, 6, 6, 7, 7, 8, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS a(n) = A000030(A000578(n)). - Reinhard Zumkeller, Aug 17 2008 REFERENCES N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). LINKS T. D. Noe, Table of n, a(n) for n = 0..1000 Eric Weisstein's World of Mathematics, Gelfand's Question MAPLE a:= n-> parse(""||(n^3)[1]): seq(a(n), n=0..100); # Alois P. Heinz, Aug 06 2021 MATHEMATICA a[n_] := First[IntegerDigits[n^3]]; Table[a[n], {n, 0, 100}] (* Vladimir Joseph Stephan Orlovsky, Dec 21 2008 *) PROG (Haskell) a002994 = a000030 . a000578 -- Reinhard Zumkeller, Apr 01 2015 (PARI) a(n) = if (n, digits(n^3)[1], 0); \\ Michel Marcus, Dec 13 2017 CROSSREFS Cf. A000030, A000578, A144582, A002993. Sequence in context: A179954 A197518 A248300 * A097408 A228818 A195845 Adjacent sequences: A002991 A002992 A002993 * A002995 A002996 A002997 KEYWORD nonn,easy,base AUTHOR N. J. A. Sloane STATUS approved

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Last modified December 4 11:57 EST 2023. Contains 367560 sequences. (Running on oeis4.)