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 A253908 Partial sums of A072272. 6
 1, 6, 11, 28, 33, 58, 75, 136, 141, 166, 191, 276, 293, 378, 439, 656, 661, 686, 711, 796, 821, 946, 1031, 1336, 1353, 1438, 1523, 1812, 1873, 2178, 2395, 3168, 3173, 3198, 3223, 3308, 3333, 3458, 3543, 3848, 3873, 3998, 4123, 4548, 4633, 5058, 5363, 6448, 6465, 6550, 6635, 6924, 7009, 7434, 7723, 8760, 8821, 9126, 9431, 10468 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Also, total number of cubic ON cells after n generations in a three-dimensional cellular automaton where A072272(n) gives the number of cubic ON cells in the n-th level of the structure starting from the top. An ON cell remains ON forever. The structure looks like an irregular step pyramid. LINKS N. J. A. Sloane, Table of n, a(n) for n = 0..8192 N. J. A. Sloane, On the Number of ON Cells in Cellular Automata, arXiv:1503.01168, 2015 N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS CROSSREFS Cf. A072272, A116520, A245542, A253767. Sequence in context: A007433 A061725 A105708 * A273504 A273608 A273681 Adjacent sequences:  A253905 A253906 A253907 * A253909 A253910 A253911 KEYWORD nonn AUTHOR Omar E. Pol, Jan 27 2015 EXTENSIONS Offset changed to 0 by N. J. A. Sloane, Feb 06 2015 STATUS approved

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Last modified May 26 22:58 EDT 2020. Contains 334634 sequences. (Running on oeis4.)