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A271577 Powers, squares excepted, of the form x^2+y^4, with x,y > 0 (see A111925). 2
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 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
32 = 2^5 = 16 + 16 = 2^2 + 2^4, so 32 is a term.
PROG
(PARI) isok(n) = {if ((p=ispower(n)) && (p != 2), for (k=1, n-1, if (issquare(k) && (p=ispower(n-k, 4)), return (1)); ); ); }
CROSSREFS
Sequence in context: A238534 A297091 A371453 * A116003 A035711 A035477
KEYWORD
nonn
AUTHOR
Michel Marcus, Apr 10 2016
STATUS
approved

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Last modified May 18 00:34 EDT 2024. Contains 372608 sequences. (Running on oeis4.)