A246335 Second bisection of A246333.

1, 5, 9, 21, 25, 37, 57, 85, 89, 101, 121, 165, 169, 213, 217, 317, 321, 333, 353, 397, 401, 461, 481, 637, 593, 733, 689, 877, 801, 981, 921, 1157, 1185, 1197, 1217, 1261, 1265, 1325, 1345, 1501, 1457, 1613, 1585, 1829, 1721, 2037, 1913, 2381, 2145, 2477, 2409, 2685

Offset

0,2

Comments

a(2^k-1) begins 1,5,21,85, which is (4^k-1)/3, but a(15) = 317 not 341, breaking the pattern.

Links

Table of n, a(n) for n=0..51.

N. J. A. Sloane, Illustration of first 24 generations of A246333

N. J. A. Sloane, Illustration of a(6) = 57 (Note that this is a different configuration of 57 cells from that in generation 6 of A169707, although the configurations of 37 cells at generation 5 are the same up to rotation.)

N. J. A. Sloane, On the Number of ON Cells in Cellular Automata, arXiv:1503.01168, 2015

Index entries for sequences related to cellular automata

Mathematica

max = 100; (Partition[Total[Flatten[#]]& /@ CellularAutomaton[{493, {2, {{0, 2, 0}, {2, 1, 2}, {0, 2, 0}}}, {1, 1}}, {{{1}}, 0}, max], 2] /. {a_, b_} -> {a, (max + 1 - Mod[max, 2])^2 - b} )[[All, 2]] (* Jean-François Alcover, Oct 03 2018 *)

Crossrefs

Cf. A246333, A246334, A247001. Similar to but different from A169707.

Sequence in context: A256260 A256250 A256138 * A255264 A321170 A328407

Adjacent sequences: A246332 A246333 A246334 * A246336 A246337 A246338

Keyword

nonn

Author

N. J. A. Sloane, Aug 30 2014

Status

approved