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A360512
Total number of edges after n generations in hexagonal graph constructed in first quadrant (see Comments in A360501 for precise definition).
2
0, 1, 2, 4, 8, 13, 19, 26, 34, 44, 54, 66, 78, 93, 107, 124, 140, 160, 178, 200, 220, 245, 267, 294, 318, 348, 374, 406, 434, 469, 499, 536, 568, 608, 642, 684, 720, 765, 803, 850, 890, 940, 982, 1034, 1078, 1133, 1179, 1236, 1284, 1344, 1394, 1456, 1508, 1573, 1627, 1694, 1750
OFFSET
0,3
FORMULA
G.f. = x*(1+x+x^2+3*x^3+2*x^4+x^5+x^6-x^7)/((1-x)*(1-x^2)*(1-x^4)).
CROSSREFS
Partial sums of A360501.
Sequence in context: A037380 A328005 A186752 * A030503 A245094 A164486
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Feb 09 2023
STATUS
approved