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 A077651 Initial digit of phi(n), where phi is Euler totient function, A000010. 2
 1, 1, 2, 2, 4, 2, 6, 4, 6, 4, 1, 4, 1, 6, 8, 8, 1, 6, 1, 8, 1, 1, 2, 8, 2, 1, 1, 1, 2, 8, 3, 1, 2, 1, 2, 1, 3, 1, 2, 1, 4, 1, 4, 2, 2, 2, 4, 1, 4, 2, 3, 2, 5, 1, 4, 2, 3, 2, 5, 1, 6, 3, 3, 3, 4, 2, 6, 3, 4, 2, 7, 2, 7, 3, 4, 3, 6, 2, 7, 3, 5, 4, 8, 2, 6, 4, 5, 4, 8, 2, 7, 4, 6, 4, 7, 3, 9, 4, 6, 4, 1, 3, 1, 4, 4 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Antti Karttunen, Table of n, a(n) for n = 1..10000 FORMULA a(n) = A000030(A000010(n)). MATHEMATICA Table[First[IntegerDigits[EulerPhi[w]]], {w, 1, 128}] PROG (PARI) A077651(n) = (digits(eulerphi(n))[1]); \\ Antti Karttunen, Dec 04 2017 CROSSREFS Cf. A000030, A000010, A004085. Sequence in context: A278229 A233027 A262550 * A004085 A293482 A086296 Adjacent sequences:  A077648 A077649 A077650 * A077652 A077653 A077654 KEYWORD base,nonn AUTHOR Labos Elemer, Nov 19 2002 STATUS approved

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Last modified September 26 20:34 EDT 2021. Contains 347672 sequences. (Running on oeis4.)