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A253098
Partial sums of A169707.
1
1, 6, 15, 36, 61, 98, 155, 240, 329, 430, 551, 700, 869, 1082, 1363, 1704, 2049, 2406, 2783, 3188, 3613, 4082, 4619, 5216, 5833, 6494, 7223, 8028, 8917, 9962, 11203, 12568, 13937, 15318, 16719, 18148, 19597, 21090, 22651, 24272, 25913, 27598, 29351, 31180, 33093, 35162, 37427
OFFSET
0,2
COMMENTS
Also, total number of cubic ON cells after n generations in a three-dimensional cellular automaton in which A169707(n) gives the number of cubic ON cells in the n-th level of the structure starting from the top. The structure looks like an irregular stepped pyramid. Note that there are two versions of this pyramid because there are two versions of the structure of the cellular automaton of A169707. - Omar E. Pol, Feb 17 2015
CROSSREFS
Cf. A169707.
Sequence in context: A273451 A272928 A269567 * A272989 A273644 A273797
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Feb 16 2015
STATUS
approved