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A113589
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A complementary variation of 'n described': if n is read as "a ones b twos" then a(n) = "one a's two b's", etc.
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2
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0, 1, 11, 111, 1111, 11111, 111111, 1111111, 11111111, 111111111, 1, 2, 111, 1111, 11111, 111111, 1111111, 11111111, 111111111, 1111111111, 11, 111, 22, 11111, 111111, 1111111, 11111111, 111111111, 1111111111, 11111111111, 111, 1111, 11111, 222
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OFFSET
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0,3
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LINKS
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FORMULA
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EXAMPLE
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A045918(10) = 1110 = 'one one one zero', hence a(10) = 'one one, zero ones' = 1.
A045918(11) = 21 = 'two ones', hence a(11) = 'one twos' = 2.
a(123) = 111111.
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PROG
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(PARI) a(n) = { my (d=[]); while (n, my (t=n%10, k=0); while (n%10==t, n\=10; k++; ); for (i=1, t, d=concat(digits(k), d))); fromdigits(d) } \\ Rémy Sigrist, Feb 09 2022
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CROSSREFS
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KEYWORD
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base,nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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