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A222228
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In the number n, replace all (decimal) digits '2' with '4' and vice versa.
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1
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0, 1, 4, 3, 2, 5, 6, 7, 8, 9, 10, 11, 14, 13, 12, 15, 16, 17, 18, 19, 40, 41, 44, 43, 42, 45, 46, 47, 48, 49, 30, 31, 34, 33, 32, 35, 36, 37, 38, 39, 20, 21, 24, 23, 22, 25, 26, 27, 28, 29, 50, 51, 54, 53, 52, 55, 56, 57, 58, 59, 60, 61, 64, 63, 62, 65, 66
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refs;
listen;
history;
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OFFSET
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0,3
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COMMENTS
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The map which is applied to primes in A171021.
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 0..1000
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MATHEMATICA
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a[n_]:= IntegerDigits[n]/.{2->4, 4->2} // FromDigits; Table[a[n], {n, 0, 80}] (* Vincenzo Librandi, Jul 30 2013 *)
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PROG
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(PARI) A222228(n, d=[0, 1, 4, 3, 2, 5, 6, 7, 8, 9])=sum(i=1, #n=digits(n), d[n[i]+1]*10^(#n-i)) \\ gives correct value for n=0 iff d[1]=0, since digits(0)=[] in PARI (v.2.6)
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CROSSREFS
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Cf. A222210-A222254; A171013-A171016, A175770, A171018-A171057.
Sequence in context: A159846 A071890 A167837 * A263449 A261831 A260458
Adjacent sequences: A222225 A222226 A222227 * A222229 A222230 A222231
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KEYWORD
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nonn,base,easy
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AUTHOR
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M. F. Hasler, Feb 12 2013
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STATUS
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approved
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