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 A085978 Number of 4's in decimal expansion of prime(n). 10
 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,86 LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 PROG (Haskell) a085978 = count4 0 . a000040 where    count4 c x | d == 4    = if x < 10 then c + 1 else count4 (c + 1) x'               | otherwise = if x < 10 then c else count4 c x'               where (x', d) = divMod x 10 -- Reinhard Zumkeller, Apr 08 2014 CROSSREFS Cf. 0's A085974, 1's A085975, 2's A085976, 3's A085977, 5's A085979, 6's A085980, 7's A085981, 8's A085982, 9's A085983. Sequence in context: A131341 A124034 A211312 * A141044 A064284 A030409 Adjacent sequences:  A085975 A085976 A085977 * A085979 A085980 A085981 KEYWORD base,nonn AUTHOR Jason Earls, Jul 06 2003 STATUS approved

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Last modified October 14 07:06 EDT 2019. Contains 327995 sequences. (Running on oeis4.)