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A115998 Primes p such that adding their adjacent digits in pairs, the digits of their index pi(p) is obtained, in some order. 1
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; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..25.

FORMULA

a(n)=A000040(A115999(n)). [From R. J. Mathar, Aug 10 2008]

EXAMPLE

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.

CROSSREFS

Cf. A115999, A116070.

Sequence in context: A031693 A158228 A209843 * A092324 A122976 A098245

Adjacent sequences:  A115995 A115996 A115997 * A115999 A116000 A116001

KEYWORD

nonn,base,fini

AUTHOR

Giovanni Resta, Feb 13 2006

EXTENSIONS

All values replaced by R. J. Mathar, Aug 10 2008

STATUS

approved

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Last modified August 18 17:55 EDT 2018. Contains 313834 sequences. (Running on oeis4.)