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A222228 In the number n, replace all (decimal) digits '2' with '4' and vice versa. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

The map which is applied to primes in A171021.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

MATHEMATICA

a[n_]:= IntegerDigits[n]/.{2->4, 4->2} // FromDigits; Table[a[n], {n, 0, 80}] (* Vincenzo Librandi, Jul 30 2013 *)

PROG

(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)

CROSSREFS

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

KEYWORD

nonn,base,easy

AUTHOR

M. F. Hasler, Feb 12 2013

STATUS

approved

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Last modified April 16 09:52 EDT 2021. Contains 343034 sequences. (Running on oeis4.)