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Search: id:A053242
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| 20, 21, 49, 50, 56, 57, 79, 80, 108, 109, 132, 133, 145, 146, 155, 170, 171, 177, 178, 201, 230, 231, 253, 254, 260, 277, 278, 289, 290, 307, 308, 341, 347, 348, 376, 382, 383, 405, 406, 412, 413, 424, 425, 437, 438, 467, 495, 496, 548, 549, 555, 570, 585
(list; graph; listen)
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OFFSET
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1,1
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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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CROSSREFS
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Cf. A000203, A053226, A053238, A053239, A053240, A053241, A053243, A053244, A053245.
Sequence in context: A041804 A041802 A041800 this_sequence A041818 A041816 A041814
Adjacent sequences: A053239 A053240 A053241 this_sequence A053243 A053244 A053245
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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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