| 0, 0, 1, 2, 7, 10, 11, 22, 51, 78, 95, 114, 507, 592, 1263, 2186, 2263, 3198, 4233, 4402, 9667, 9918, 11189, 19912, 21675, 23182, 44469, 86214, 110473, 132018, 216059, 756806, 859399, 1257752, 1398233, 2976184, 3021339, 6972554, 13466877
(list; graph; listen)
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OFFSET
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1,4
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LINKS
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O. E. Pol, Determinacion geometrica de los numeros primos y perfectos.
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FORMULA
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a(n)=base 2 logarithm of (A061652(n)/(2^n)) = A000043(n)-n-1 = A090748(n)-n.
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EXAMPLE
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a(5)=7 because the 5th even superperfect number is 4096, 2^5=32, 4096/32=128 and base 2 logarithm of 128 is 7 (because 2^7=128).
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CROSSREFS
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Cf. A000043, A000396, A000668, A019279, A061652, A090748, A133028.
Sequence in context: A045266 A108493 A069494 this_sequence A030344 A029904 A026364
Adjacent sequences: A134709 A134710 A134711 this_sequence A134713 A134714 A134715
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KEYWORD
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nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Nov 07 2007
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