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 A126658 Prime numbers that are the sum of three distinct positive eighth powers. 4
 72353, 1745153, 7444673, 44726593, 49202147, 61503553, 100006817, 100072097, 101686177, 107444417, 143046977, 214756067, 257412163, 430372577, 431661313, 435812033, 447149537, 452523713, 489805633, 530372321, 744340577, 834187553 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS These are also the sum of three squares and the sum of three fourth powers: 7444673 = 16^2 + 1296^2 + 2401^2 = 4^4 + 36^4 + 49^4 = 256 + 1679616 + 5764801. LINKS Table of n, a(n) for n=1..22. EXAMPLE 72353 = 2^8 + 3^8 + 4^8 = 256 + 6561 + 65536. 7444673 = 2^8 + 6^8 + 7^8 = 256 + 1679616 + 5764801. 49202147 = 5^8 + 7^8 + 9^8 = 390625 + 5764801 + 43046721. PROG (PARI) {m=14; p=m^8; v=vector(m, x, x^8); w=[]; for(i=1, m-2, for(j=i+1, m-1, for(k=j+1, m, if((n=v[i]+v[j]+v[k])

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Last modified June 13 22:21 EDT 2024. Contains 373391 sequences. (Running on oeis4.)