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 A167243 Number of ways to partition an n X 3 grid into 3 connected equal-area regions. 1
 1, 3, 10, 23, 56, 132, 259, 546, 1095, 2043, 3908, 7379, 13208, 24194, 43819, 76790, 136489, 241311, 416152, 726073, 1261696, 2153026, 3706393, 6364842, 10775173, 18374181 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..26. EXAMPLE All solutions for n=4 ...1.1.2...1.1.2...1.1.2...1.1.2...1.1.2...1.1.2...1.1.1...1.1.1...1.1.1 ...1.2.2...1.2.2...1.1.2...1.1.2...1.3.2...3.1.2...1.2.2...1.2.2...1.2.2 ...1.2.3...1.3.2...3.2.2...3.3.2...1.3.2...3.1.2...2.2.3...3.2.2...3.3.2 ...3.3.3...3.3.3...3.3.3...3.3.2...3.3.2...3.3.2...3.3.3...3.3.3...3.3.2 ------ ...1.1.1...1.1.1...1.1.1...1.1.1...1.1.1...1.1.1...1.1.1...1.2.2...1.2.2 ...1.2.3...2.2.1...2.2.1...2.2.1...2.1.3...2.1.3...2.3.1...1.2.2...1.2.2 ...2.2.3...2.2.3...2.3.3...3.2.2...2.2.3...2.3.3...2.3.3...1.1.3...1.3.3 ...2.3.3...3.3.3...2.3.3...3.3.3...2.3.3...2.2.3...2.2.3...3.3.3...1.3.3 ------ ...1.2.2...1.2.2...1.2.2...1.2.2...1.2.3 ...1.2.3...1.1.2...1.1.2...1.3.2...1.2.3 ...1.2.3...1.3.2...3.1.2...1.3.2...1.2.3 ...1.3.3...3.3.3...3.3.3...1.3.3...1.2.3 CROSSREFS Cf. A167242. Sequence in context: A294503 A080204 A115982 * A316403 A185828 A134438 Adjacent sequences: A167240 A167241 A167242 * A167244 A167245 A167246 KEYWORD nonn AUTHOR R. H. Hardin, Oct 31 2009 STATUS approved

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Last modified December 4 13:48 EST 2023. Contains 367563 sequences. (Running on oeis4.)