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A153804 a(n) = A153801(n)/2. 1
0, 0, 0, 0, 1, 2, 1, 6, 19, 30, 38, 45, 240, 282, 616, 1075, 1111, 1578, 2093, 2176, 4808, 4931, 5565, 9924, 10802, 11554, 22197, 43068, 55197, 65968, 107982, 378354, 429648, 628824, 699060, 1488035, 1510610, 3486215, 6733375 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..39.

FORMULA

a(n) = (A000043(n)-A000040(n))/2.

CROSSREFS

Cf. A000040, A000043, A153800, A153801, A153802, A153804.

Sequence in context: A097947 A101032 A025271 * A239740 A268371 A100404

Adjacent sequences:  A153801 A153802 A153803 * A153805 A153806 A153807

KEYWORD

more,nonn

AUTHOR

Omar E. Pol, Jan 13 2009

EXTENSIONS

More terms from R. J. Mathar, Mar 14 2009

STATUS

approved

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Last modified December 9 23:16 EST 2016. Contains 278993 sequences.