[go: up one dir, main page]

login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A122790
Decimal expansion of Wagon's constant: the average "dropping time" of the Collatz (3x+1) iteration.
2
9, 4, 7, 7, 9, 5, 5, 5, 5, 6, 5, 5, 9, 2, 7, 4, 7, 3, 6, 9, 1, 6, 6, 8, 1, 0, 1, 2, 5, 8, 9, 0, 4, 1, 9, 4, 2, 2, 8, 1, 8, 7, 1, 6, 0, 4, 4, 2, 7, 2, 9, 9, 7, 1, 5, 9, 2, 7, 4, 4, 2, 3, 5, 6, 6, 6, 7, 0, 1, 5, 3, 2, 2, 1, 6, 2, 4, 8, 2, 8, 1, 7, 7, 5, 6, 1, 0, 6, 8, 5, 6, 5, 5, 7, 3, 1, 0, 4, 0, 2, 6, 4, 4, 4, 3
OFFSET
1,1
FORMULA
Sum_{k>0} A122437(k+1)*A100982(k)/2^(A020914(k)-1) = 9.47795555655927473691668101258904...
CROSSREFS
Cf. A060445 (dropping time of the 3x+1 iteration starting at 2n+1), A100982, A122791.
Sequence in context: A176515 A087017 A065466 * A288241 A199665 A113273
KEYWORD
cons,nonn
AUTHOR
T. D. Noe, Sep 11 2006
STATUS
approved