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A255942 Number of collections of nonempty multisets with a total of n objects of exactly two colors. 3
2, 8, 23, 56, 127, 268, 547, 1072, 2055, 3836, 7045, 12692, 22566, 39542, 68520, 117354, 199082, 334446, 557175, 920528, 1509606, 2457698, 3974813, 6387026, 10201990, 16201424, 25589505, 40205766, 62857564, 97800674, 151475564, 233575222, 358656011, 548476318 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Alois P. Heinz, Table of n, a(n) for n = 2..1000

FORMULA

a(n) = A255903(n,2).

CROSSREFS

Column k=2 of A255903.

Sequence in context: A014285 A079460 A154144 * A180664 A294959 A290926

Adjacent sequences:  A255939 A255940 A255941 * A255943 A255944 A255945

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Mar 11 2015

STATUS

approved

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Last modified October 18 22:26 EDT 2019. Contains 328211 sequences. (Running on oeis4.)