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 A193583 Number of fixed points under iteration of sum of squares of digits in base b. 8
 1, 3, 1, 3, 1, 5, 3, 3, 1, 3, 3, 7, 1, 3, 1, 7, 5, 3, 1, 7, 3, 7, 1, 3, 1, 7, 3, 3, 3, 7, 5, 7, 3, 3, 1, 7, 5, 3, 1, 5, 3, 11, 3, 3, 3, 15, 3, 3, 3, 3, 3, 7, 1, 7, 1, 15, 3, 3, 3, 3, 3, 7, 3, 3, 1, 7, 7, 3, 5, 3, 7, 15, 1, 7, 3, 7, 3, 3, 3, 7, 5, 15, 1, 3, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,2 COMMENTS If b>=2 and a>=b^2 then S(a,2,b) 23 and 2^2+3^2 = 13; decimal 18 -> 33 and 3^2+3^2 = 18. - Christian N. K. Anderson, Apr 22 2013 PROG (R) library(gmp); y=rep(0, 10000) for(B in 1:10000) y[B]=prod(table(as.numeric(factorize(1+as.bigz(B)^2)))+1)-1; y # Christian N. K. Anderson, Apr 22 2013 CROSSREFS Equals A193432-1. Cf. A007770. Cf. A002654, A000005. Sequence in context: A218355 A103790 A249947 * A331731 A309891 A317937 Adjacent sequences:  A193580 A193581 A193582 * A193584 A193585 A193586 KEYWORD nonn,base AUTHOR Martin Renner, Jul 31 2011 STATUS approved

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Last modified July 28 10:29 EDT 2021. Contains 346326 sequences. (Running on oeis4.)