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A068309 Number of different lucky numbers occurring when 2n is expressed as p1+q1 = ... = pk+qk where pk,qk are lucky numbers with pk <= qk. 0
1, 2, 1, 2, 4, 2, 3, 6, 3, 2, 6, 4, 3, 6, 3, 4, 8, 4, 6, 8, 3, 6, 10, 2, 7, 10, 4, 6, 10, 2, 5, 10, 5, 6, 10 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

n=5: 10 = 1+9 = 3+7, we can see 4 different lucky numbers. so a(5) = 4.

LINKS

Table of n, a(n) for n=1..35.

CROSSREFS

Cf. A000959, A002850.

Sequence in context: A279709 A261880 A119538 * A099470 A099254 A186731

Adjacent sequences:  A068306 A068307 A068308 * A068310 A068311 A068312

KEYWORD

easy,nonn

AUTHOR

Naohiro Nomoto, Feb 25 2002

STATUS

approved

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Last modified February 18 03:38 EST 2020. Contains 332006 sequences. (Running on oeis4.)