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Search: id:A115998
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| A115998 |
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Primes p such that adding their adjacent digits in pairs, the digits of their index pi(p) is obtained, in some order. |
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+0
2
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| 227, 10223, 21163, 26021, 44041, 421409, 530513, 702413, 2402107, 5205103, 6012613, 6013081, 7272217, 21033601, 21261041, 23161601, 27115301, 31302109, 31536017, 40020317, 40233409, 40710311, 41136217, 42311407, 44124209
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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a(n)=A000040(A115999(n)). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 10 2008]
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EXAMPLE
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45260203 is a member since p(2732986)=45260203 and adding adjacent pairs of digits of 45260203 we obtain (4+5)=9, (5+2)=7, (2+6)=8, (6+0)=6, (0+2)=2, (2+0)=2, (0+3)=3, and the digits 9,7,8,6,2,2,3, order apart, are the same of 2732986.
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CROSSREFS
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Cf. A115999, A116070.
Adjacent sequences: A115995 A115996 A115997 this_sequence A115999 A116000 A116001
Sequence in context: A142390 A142219 A031693 this_sequence A092324 A122976 A098245
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KEYWORD
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nonn,base,fini
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AUTHOR
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Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 13 2006
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EXTENSIONS
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All values replaced by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 10 2008
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