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A271577
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Powers, squares excepted, of the form x^2+y^4, with x,y > 0 (see A111925).
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2
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32, 512, 2197, 3125, 8000, 8192, 15625, 64000, 100000, 131072, 1419857, 1953125, 2097152, 3200000, 7189057, 8000000, 8998912, 9765625, 11390625, 11881376, 30664297, 32768000, 33554432, 35287552, 62748517, 64000000, 69343957, 115856201, 125000000, 221445125, 262144000, 272097792
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OFFSET
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1,1
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LINKS
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EXAMPLE
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32 = 2^5 = 16 + 16 = 2^2 + 2^4, so 32 is a term.
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PROG
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(PARI) isok(n) = {if ((p=ispower(n)) && (p != 2), for (k=1, n-1, if (issquare(k) && (p=ispower(n-k, 4)), return (1)); ); ); }
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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