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A138883
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Number of digits in n-th even superperfect number A061652(n).
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0
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1, 1, 2, 2, 4, 5, 6, 10, 19, 27, 32, 38, 157, 183, 385, 663, 687, 969, 1280, 1332, 2917, 2993, 3376, 6002, 6533, 6987, 13395, 25962, 33265, 39751, 65050, 227831, 258715, 378632, 420921, 895932, 909525, 2098960
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| Also, number of digits in n-th superperfect number A019279(n), if there are no odd superperfect numbers.
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FORMULA
| a(n)=A055642(A061652(n)). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 22 2008
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CROSSREFS
| Cf. A019279, A028335, A061193, A061652.
Sequence in context: A121269 A056219 A085140 * A107849 A053036 A067957
Adjacent sequences: A138880 A138881 A138882 * A138884 A138885 A138886
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KEYWORD
| base,nonn
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AUTHOR
| Omar E. Pol (info(AT)polprimos.com), Apr 08 2008
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EXTENSIONS
| More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 22 2008
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