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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

Vaclav Kotesovec, Table of n, a(n) for n = 2..10000 (terms 2..1000 from Alois P. Heinz)

FORMULA

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

CROSSREFS

Column k=2 of A255903.

Sequence in context: A330152 A079460 A154144 * A355551 A180664 A294959

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 March 31 11:19 EDT 2023. Contains 361646 sequences. (Running on oeis4.)