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A130826 a(n) is the smallest number such that twice the number of divisors of (a(n)-n)/3 gives the n-th term in the first differences of the sequence produced by the Flavius Josephus sieve, A000960. 1
4, 8, 15, 16, 23, 42, 55, 200, 81, 46, 119, 192, 205, 196622, 12303, 88, 449, 558, 127, 1748, 786453, 58, 2183, 3096, 1105, 786458, 12582939, 568, 2189, 2730, 9247, 572, 8673, 3106, 2195, 8676, 145, 110630, 3819, 2200, 786473, 20202, 79, 7604, 7077933 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The first six terms in the sequence are those from the TV show Lost, see A104101.
LINKS
M. E. Andersson, Das Flaviussche Sieb, Acta Arith., 85 (1998), 301-307.
V. Gardiner, R. Lazarus, N. Metropolis and S. Ulam, On certain sequences of integers defined by sieves, Math. Mag., 29 (1955), 117-119.
EXAMPLE
a(8)=200 because the 8th term in A056526 is 14. Half of that is 7. The smallest number with seven divisors is 64 and 64*3 + 8 = 200.
CROSSREFS
Sequence in context: A354846 A214440 A104101 * A312708 A329132 A312709
KEYWORD
dumb,nonn
AUTHOR
Stephen Casey (hexomino(AT)gmail.com), Jul 17 2007
EXTENSIONS
Corrected and extended by Alois P. Heinz, Nov 27 2009
STATUS
approved

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Last modified March 18 22:29 EDT 2024. Contains 370951 sequences. (Running on oeis4.)