id:A077651 - OEIS Search Results

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Initial digit of phi[n].

+0
1

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; listen)

	OFFSET	`1,3`
	FORMULA	`a[n]=A000030[A000010(n)]`
	MATHEMATICA	`Table[First[IntegerDigits[EulerPhi[w]]], {w, 1, 128}]`
	CROSSREFS	`Cf. A000030, A000010.` `Sequence in context: A082175 A129292 A126606 this_sequence A004085 A086296 A096504` `Adjacent sequences: A077648 A077649 A077650 this_sequence A077652 A077653 A077654`
	KEYWORD	`base,nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Nov 19 2002`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

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