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A047880 a(n)=(1/2)*b(n), where b=A049690. 0
0, 5, 5, 9, 12, 19, 25, 35, 41, 54, 63, 78, 88, 106, 118, 139, 152, 175, 191, 217, 233, 262, 281, 312, 332, 366, 388, 425, 448, 487, 513, 555, 581, 626, 655, 702, 732, 782, 814, 867, 900, 955, 991, 1049, 1085, 1146, 1185, 1248, 1288 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..48.

CROSSREFS

Sequence in context: A163980 A290968 A011986 * A058491 A058584 A324792

Adjacent sequences:  A047877 A047878 A047879 * A047881 A047882 A047883

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified January 19 09:35 EST 2020. Contains 331048 sequences. (Running on oeis4.)