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A076641 Integers read backwards, but with repetitions omitted. 2
1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 21, 31, 41, 51, 61, 71, 81, 91, 12, 22, 32, 42, 52, 62, 72, 82, 92, 13, 23, 33, 43, 53, 63, 73, 83, 93, 14, 24, 34, 44, 54, 64, 74, 84, 94, 15, 25, 35, 45, 55, 65, 75, 85, 95, 16, 26, 36, 46, 56, 66, 76, 86, 96, 17, 27, 37, 47, 57, 67, 77, 87, 97 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = A004086(A067251(n)). - Reinhard Zumkeller, Aug 12 2013

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

EXAMPLE

10 backwards is 01=1, but 1 already appears, so omit it.

MAPLE

s := (L::list)->sum(L[i]*10^(nops(L)-i), i=1..nops(L)); d := (X::posint)->convert(X, base, 10); SD := K->[seq(s(d(k)), k=1..K)];

PROG

(Haskell)

a076641 = a004086 . a067251  -- Reinhard Zumkeller, Aug 12 2013

CROSSREFS

Cf. A004086.

Sequence in context: A161390 A096106 A321990 * A076643 A326402 A127204

Adjacent sequences:  A076638 A076639 A076640 * A076642 A076643 A076644

KEYWORD

easy,nonn,base

AUTHOR

Francois Jooste (phukraut(AT)hotmail.com), Oct 23 2002

STATUS

approved

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Last modified December 5 13:26 EST 2019. Contains 329751 sequences. (Running on oeis4.)