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A053240
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n for which values not equal to 2 occur in the expansion of A053238.
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8
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5, 20, 21, 29, 34, 49, 50, 56, 57, 65, 70, 79, 80, 94, 99, 108, 109, 123, 132, 133, 145, 146, 154, 155, 170, 171, 177, 178, 198, 200, 201, 227, 230, 231, 239, 244, 253, 254, 259, 260, 274, 277, 278, 280, 289, 290, 304, 307, 308, 310, 327, 332, 340, 341, 347
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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_Reinhard Zumkeller_, Table of n, a(n) for n = 1..10000
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MAPLE
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with(numtheory): f := [seq( `if`((sigma(i) > sigma(i+1)), i, print( )), i=1..5000)];
seq( `if`(f[i+1] - f[i] <> 2, i, print( )), i=1..1000);
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PROG
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(Haskell)
import Data.List (findIndices)
a053240 n = a053240_list !! (n-1)
a053240_list = map (+ 1) $ findIndices (/= 2) a053238_list
-- Reinhard Zumkeller, Oct 16 2011
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CROSSREFS
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Cf. A000203, A053226, A053238, A053239, A053241 (complement), A053242, A053243, A053244, A053245.
Sequence in context: A030696 A098047 A101728 * A034123 A088973 A005240
Adjacent sequences: A053237 A053238 A053239 * A053241 A053242 A053243
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KEYWORD
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nonn
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AUTHOR
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Asher Auel (asher.auel(AT)reed.edu) Jan 10, 2000
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STATUS
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approved
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