A108415 - OEIS

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A108415

a(n) = 1, 2 or 3 (resp.) if prime(n) is weak, balanced or strong (resp.).

1, 2, 1, 3, 1, 3, 1, 1, 3, 1, 3, 3, 1, 1, 2, 3, 1, 3, 3, 1, 3, 1, 1, 3, 3, 1, 3, 1, 1, 3, 1, 3, 1, 3, 1, 2, 3, 1, 2, 3, 1, 3, 1, 3, 1, 2, 3, 3, 1, 1, 3, 1, 3, 2, 2, 3, 1, 3, 3, 1, 1, 3, 3, 1, 1, 3, 1, 3, 1, 1, 1, 3, 2, 3, 1, 1, 3, 1, 1, 3, 1, 3, 1, 3, 1, 1, 3, 3, 1, 1, 3, 3, 1, 3, 1, 1, 3, 1, 3, 1, 3, 2, 3, 1, 1 (list; graph; refs; listen; history; internal format)

	OFFSET	`2,2`
	COMMENTS	`n >= 2: a(n) = 1, 2 or 3 (resp.) if n-th prime is in A051635, A006562 or A051634 (resp.).`
	MATHEMATICA	`A108415[n_]:=2+Sign[Prime[n]-1/2(Prime[n-1]+Prime[n+1])]`
	CROSSREFS	`Cf. A051635, A006562, A051634.` `Sequence in context: A176572 A168017 A046924 * A136644 A111963 A078079` `Adjacent sequences: A108412 A108413 A108414 * A108416 A108417 A108418`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Jun 02 2005`

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Last modified February 15 15:20 EST 2012. Contains 205823 sequences.