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A221639
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5^(5n+1) + 4^(5n+2) + 3^(5n).
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1
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22, 32252, 65664390, 169782108716, 494432831031942, 1508131365182857052, 4675059823042234224390, 14570804744329875486495116, 45494077913917911421604180742, 142128354195602915965174073201852, 444109492260384165827568467076384390
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OFFSET
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0,1
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COMMENTS
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All terms are multiples of 22.
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REFERENCES
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Hugo Steinhaus: Studentenfutter, Urania, Leipzig 1991, #5
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LINKS
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FORMULA
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G.f. -22*(1-2926*x+754280*x^2) / ( (243*x-1)*(3125*x-1)*(1024*x-1) ). - R. J. Mathar, Aug 09 2013
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PROG
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(Haskell)
a221639 n = 5 ^ (5 * n + 1) + 4 ^ (5 * n + 2) + 3 ^ (5 * n)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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