id:A077649 - OEIS Search Results

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Initial digits of composite numbers.

+0
1

4, 6, 8, 9, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a[n]=A000030[A002808(n)]`
	MATHEMATICA	`c[x_] := FixedPoint[x+PrimePi[ # ]+1&, x] Table[First[IntegerDigits[c[w]]], {w, 1, 128}]`
	CROSSREFS	`Cf. A000030, A002808, A077648.` `Sequence in context: A083786 A110750 A129808 this_sequence A132025 A123870 A085049` `Adjacent sequences: A077646 A077647 A077648 this_sequence A077650 A077651 A077652`
	KEYWORD	`base,nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Nov 19 2002`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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