id:A122261 - OEIS Search Results

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Characteristic function of numbers having only factors that are Pierpont primes.

+0
4

1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`a(n) = if n=1 then 0 else A122262(n) - A122262(n-1);` `a(A122260(n)) = 1;` `a(n) = A122255(n) for n < 25.`
	LINKS	`Index entries for characteristic functions` `Eric Weisstein's World of Mathematics, Pierpont Prime`
	FORMULA	`Multiplicative with a(p) = A010051(p) * A065333(p-1), p prime.`
	CROSSREFS	`Sequence in context: A086299 A152066 A122255 this_sequence A014922 A014988 A015076` `Adjacent sequences: A122258 A122259 A122260 this_sequence A122262 A122263 A122264`
	KEYWORD	`nonn,mult`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 29 2006`

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Last modified November 25 13:47 EST 2009. Contains 167481 sequences.

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