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A083926
Inverse function of N -> N injection A072795.
3
0, 0, 1, 0, 2, 3, 0, 0, 0, 4, 5, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44
OFFSET
0,5
COMMENTS
a(1)=0 because A072795(0)=1, but a(n) = 0 also for those n which do not occur as values of A072795. All positive natural numbers occur here once.
FORMULA
a(n) = A083924(n)*A072772(n).
CROSSREFS
a(A072795(n)) = n for all n. Cf. A083925, A083927-A083929, A083935.
Sequence in context: A286530 A152857 A097946 * A218757 A261430 A024466
KEYWORD
nonn
AUTHOR
Antti Karttunen, May 13 2003
STATUS
approved