id:A126143 - OEIS Search Results

Search: id:A126143

Displaying 1-1 of 1 results found.

page 1

Primes whose sum of the digits of their cubes is also a prime.

+0
1

13, 17, 23, 37, 47, 67, 107, 139, 181, 193, 211, 223, 229, 241, 283, 307, 311, 313, 331, 337, 349, 353, 367, 373, 389, 397, 421, 433, 439, 487, 499, 523, 547, 571, 577, 587, 607, 613, 631, 709, 719, 727, 739, 751, 773, 787, 839, 853, 877, 881, 907, 983, 991 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`13^3=2197 2+1+9+7=19` `17^3=4913 4+9+1+3=17` `23^3=12167 1+2+1+6+7=17`
	MAPLE	`P:=proc(n) local i, k, w; for i from 1 by 1 to n do w:=0; k:=ithprime(i)^3; while k>0 do w:=w+(k-trunc(k/10)*10); k:=trunc(k/10); od; if isprime(w) then print(ithprime(i)); fi; od; end: P(500);`
	CROSSREFS	`Sequence in context: A120157 A022893 A038680 this_sequence A125262 A104278 A129070` `Adjacent sequences: A126140 A126141 A126142 this_sequence A126144 A126145 A126146`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paolo P. Lava & Giorgio Balzarotti (ppl(AT)spl.at), Mar 07 2007`

page 1

Search completed in 0.002 seconds

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

AT&T Labs Research