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A155817
Sequence having the property that a(n) is the sum of the first a(n) digits of the sequence.
2
1, 10, 2, 4, 100, 101, 11, 12, 13, 14, 30, 1000, 10000, 40, 41, 100000, 102, 43, 60, 110, 1000000, 1001, 61, 80, 111, 100000000000, 90, 10000000, 103, 104, 10001, 1110, 112, 201, 108, 91, 95, 160, 161, 100000000000000000000000000000000000, 170, 1000001
OFFSET
1,2
COMMENTS
From an idea of Eric Angelini. The condition of strict monotonicity is dropped with respect to A154328.
LINKS
EXAMPLE
We start with a(1)=1. The next term a(2) cannot be 2,...,9 because the sum of these digits would be larger: the least possibility not leading to a contradiction is a(2)=10. Then we can go on with a(3)=2 because the sum of the first two digits, 1=a(1) and 1 from 10=a(2), is equal to 2. Then a(4)=4 because sum of the first 4 digits, 1+1+0+2, is equal to 4.
CROSSREFS
Cf. A154328.
Sequence in context: A169851 A161995 A069036 * A299980 A037922 A111287
KEYWORD
nonn,base
AUTHOR
Paolo P. Lava, Jan 28 2009
EXTENSIONS
Sequence corrected and extended by N. J. A. Sloane, Aug 31 2009, using terms from the b-file
STATUS
approved