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 A135554 Numbers n such that n is the fourth power of an integer and the sum of digits of n is prime. 2
 16, 256, 625, 2401, 4096, 83521, 160000, 279841, 456976, 1048576, 1500625, 2560000, 2825761, 3748096, 4477456, 4879681, 5764801, 6250000, 7890481, 9834496, 11316496, 14776336, 16777216, 20151121, 21381376, 24010000, 28398241 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Intersection of A000583 and A028834. - Michel Marcus, Oct 19 2016 LINKS G. C. Greubel, Table of n, a(n) for n = 1..1090 EXAMPLE a(1)=16 because 2^4=16 and 1+6=7, prime. MATHEMATICA Select[Range[80]^4, PrimeQ[Total[IntegerDigits[#]]]&] (* Harvey P. Dale, Dec. 13, 2010 *) PROG (PARI) isok(n) = ispower(n, 4) && isprime(sumdigits(n)); \\ Michel Marcus, Oct 19 2016 CROSSREFS Cf. A000583, A028834, A135555. Sequence in context: A208071 A206984 A207842 * A208376 A208066 A207931 Adjacent sequences: A135551 A135552 A135553 * A135555 A135556 A135557 KEYWORD easy,nonn,base AUTHOR Enoch Haga, Nov 25 2007 EXTENSIONS Description corrected by Harvey P. Dale, Dec 13 2010 STATUS approved

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Last modified May 24 08:42 EDT 2024. Contains 372773 sequences. (Running on oeis4.)