id:A075177 - OEIS Search Results

Search: id:A075177

Displaying 1-1 of 1 results found.

page 1

Indices of additive primes - primes with prime sum-of-digits, see A046704.

+0
2

1, 2, 3, 4, 5, 9, 10, 13, 14, 15, 18, 19, 23, 24, 26, 30, 32, 33, 34, 36, 37, 40, 41, 43, 44, 45, 46, 48, 49, 50, 53, 56, 57, 60, 61, 64, 65, 66, 67, 68, 71, 72, 74, 75, 78, 79, 80, 82, 86, 87, 89, 90, 91, 93, 102, 105, 106, 108, 109, 110, 111, 116, 117, 118, 121, 124, 128 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`There are 107 additive primes among first 200 primes. There are 38455 additive primes among first 100000 primes. Additive primes are in A046704.`
	LINKS	`Zak Seidov, Table of n, a(n) for n=1..4086, a(n)<10^4.`
	FORMULA	`PrimePi[A046704(n)]`
	EXAMPLE	`Prime(10)=29 is additive prime because 2+9=11 is prime.`
	MATHEMATICA	`Map[PrimePi[ # ]&, Select[Prime[Range[200]], PrimeQ[Apply[ Plus, IntegerDigits[ # ]]]&]`
	CROSSREFS	`Cf. A046704.` `Sequence in context: A139456 A081869 A015837 this_sequence A062096 A143827 A100797` `Adjacent sequences: A075174 A075175 A075176 this_sequence A075178 A075179 A075180`
	KEYWORD	`nonn,base`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Sep 06 2002`

page 1

Search completed in 0.002 seconds

Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

AT&T Labs Research