

A151779


a(1)=1; for n > 1, a(n)=6*5^{wt(n1)1}.


11



1, 6, 6, 30, 6, 30, 30, 150, 6, 30, 30, 150, 30, 150, 150, 750, 6, 30, 30, 150, 30, 150, 150, 750, 30, 150, 150, 750, 150, 750, 750, 3750, 6, 30, 30, 150, 30, 150, 150, 750, 30, 150, 150, 750, 150, 750, 750, 3750, 30, 150, 150, 750, 150, 750, 750, 3750, 150, 750, 750, 3750
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OFFSET

1,2


COMMENTS

Number of cells turned ON in nth generation of cellular automaton based on Z^3 lattice in the same way that A147562 is based on the Z^2 lattice. Here each cell has six neighbors.


LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000
David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata, Congressus Numerantium, Vol. 206 (2010), 157191. [There is a typo in Theorem 6: (13) should read u(n) = 4.3^(wt(n1)1) for n >= 2.]
N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS


MAPLE

wt := proc(n) local w, m, i; w := 0; m := n; while m > 0 do i := m mod 2; w := w+i; m := (mi)/2; od; w; end:
f:=d>[seq((2*d)*(2*d1)^(wt(n1)1), n=2..120)];
f2:=d>[1, op(f(d))];
f2(3);


PROG

(PARI) a(n)=6*5^(hammingweight(n1)1)\1 \\ Charles R Greathouse IV, Mar 07 2015


CROSSREFS

Cf. A147582, A151780, A151781, A151782.
Sequence in context: A253066 A016725 A267651 * A255462 A066714 A054436
Adjacent sequences: A151776 A151777 A151778 * A151780 A151781 A151782


KEYWORD

nonn,easy


AUTHOR

N. J. A. Sloane, Jun 25 2009


STATUS

approved



