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A317743
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Valleys in A064800: terms which are smaller than their neighbors.
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1
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14, 18, 20, 27, 30, 32, 35, 38, 42, 44, 51, 54, 57, 59, 62, 67, 68, 72, 74, 80, 87, 90, 93, 98, 102, 104, 110, 114, 123, 128, 131, 132, 135, 138, 140, 143, 147, 150, 152, 158, 163, 164, 171, 174, 179, 182, 187, 192, 194, 198, 200
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OFFSET
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1,1
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COMMENTS
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First second-order valley is a(514) = 516
with {521, 517, 516, 517, 520}.
First third-order valley is a(k=265827) = 265829
with {265833, 265831, 265830, 265829, 265831, 265832, 265834}.
Are there minima of higher order? (End)
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LINKS
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EXAMPLE
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MATHEMATICA
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Transpose[ Select[ Partition[(# + PrimeOmega[#]) & /@ Range[201], 3, 1], #[[1]] > #[[2]] < #[[3]] &]][[2]] (* Giovanni Resta, Aug 09 2018 *)
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PROG
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(PARI) lista(nn) = {my(v = vector(nn, n, n + bigomega(n))); for (n=2, nn, if ((v[n] < v[n-1]) && (v[n] < v[n+1]), print1(v[n], ", ")); ); } \\ Michel Marcus, Sep 07 2018
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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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