id:A109066 - OEIS Search Results

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Number of prime digits in n-th prime.

+0
1

1, 1, 1, 1, 0, 1, 1, 0, 2, 1, 1, 2, 0, 1, 1, 2, 1, 0, 1, 1, 2, 1, 1, 0, 1, 0, 1, 1, 0, 1, 2, 1, 2, 1, 0, 1, 2, 1, 1, 2, 1, 0, 0, 1, 1, 0, 1, 3, 3, 2, 3, 2, 1, 2, 3, 2, 1, 2, 3, 1, 2, 2, 2, 1, 2, 2, 2, 3, 2, 1, 3, 2, 2, 3, 2, 2, 1, 2, 0, 0, 0, 1, 1, 2, 1, 1, 0, 2, 0, 1, 1, 1, 1, 0, 0, 2, 1, 2, 3, 1, 2, 3, 2, 1, 2 (list; graph; listen)

	OFFSET	`1,9`
	COMMENT	`Cf. A019546 primes whose digits are primes, A092629 number of prime digits is nonprime, A104250 sum of prime digits of n-th prime.`
	MATHEMATICA	`a[n_]:=Count[PrimeQ/@IntegerDigits[Prime[n]], True]`
	CROSSREFS	`Cf. A019546, A092629, A104250.` `Sequence in context: A099917 A137412 A025925 this_sequence A079066 A096496 A117209` `Adjacent sequences: A109063 A109064 A109065 this_sequence A109067 A109068 A109069`
	KEYWORD	`base,nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Jun 17 2005`

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Last modified July 24 12:00 EDT 2008. Contains 142294 sequences.

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