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A169788 a(n) = n(n+1)/2 - A169780(n). 3
0, 0, 0, 1, 1, 4, 6, 7, 7, 14, 20, 25, 27, 30, 36, 37, 37, 52, 66, 79, 89, 100, 112, 117, 115, 122, 140, 153, 157, 158, 168, 167, 167, 198, 228, 257, 283, 310, 338, 359, 373, 396, 428, 453, 467, 474, 486, 491, 481, 496, 538, 575, 603, 628, 654, 665, 653, 650, 680, 707, 711 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

COMMENTS

If n is a power of 2, this is the number of OFF cells after n stages in a 60-degree wedge of the hexagonal CA (see A170905, A169780, A151723, A169789).

LINKS

N. J. A. Sloane, Table of n, a(n) for n = 0..1025

CROSSREFS

Cf. A170905, A169780, A151723, A169789.

Sequence in context: A011275 A205684 A006185 * A300707 A296183 A021876

Adjacent sequences:  A169785 A169786 A169787 * A169789 A169790 A169791

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 13 2010

STATUS

approved

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Last modified April 5 06:13 EDT 2020. Contains 333238 sequences. (Running on oeis4.)