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A248493 Number of length 4+5 0..n arrays with some three disjoint pairs in each consecutive six terms having the same sum 1
22, 183, 1156, 4285, 11586, 25495, 48808, 81225, 126358, 186091, 261804, 358693, 477970, 623571, 799888, 1008829, 1252710, 1539391, 1869148, 2246457, 2680546, 3170743, 3720888, 4342813, 5035822, 5803971, 6658156, 7601953, 8637618, 9778375 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A248489

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = -2*a(n-2) -2*a(n-4) +a(n-5) -a(n-6) +3*a(n-7) +a(n-8) +5*a(n-9) +3*a(n-10) +5*a(n-11) +3*a(n-12) +2*a(n-13) -3*a(n-15) -4*a(n-16) -8*a(n-17) -6*a(n-18) -10*a(n-19) -4*a(n-20) -7*a(n-21) +a(n-22) -a(n-23) +7*a(n-24) +4*a(n-25) +10*a(n-26) +6*a(n-27) +8*a(n-28) +4*a(n-29) +3*a(n-30) -2*a(n-32) -3*a(n-33) -5*a(n-34) -3*a(n-35) -5*a(n-36) -a(n-37) -3*a(n-38) +a(n-39) -a(n-40) +2*a(n-41) +2*a(n-43) +a(n-45)

EXAMPLE

Some solutions for n=6

..3....5....2....4....5....6....1....1....2....2....2....0....4....1....3....5

..3....4....6....2....3....2....2....3....3....2....1....2....5....4....6....4

..4....6....5....3....4....4....3....2....3....5....0....2....1....3....4....6

..0....2....1....5....2....3....0....3....4....4....5....3....6....5....4....4

..1....3....4....1....6....5....4....5....5....4....6....1....3....3....5....2

..1....4....0....6....4....4....5....4....4....1....4....4....2....2....5....3

..3....5....2....4....5....6....1....4....5....2....2....3....4....1....3....5

..3....1....6....2....3....5....2....3....3....2....1....5....5....4....6....1

..4....3....5....0....1....4....6....2....6....5....3....2....1....3....4....6

CROSSREFS

Sequence in context: A191012 A248491 A248492 * A248494 A248495 A248496

Adjacent sequences:  A248490 A248491 A248492 * A248494 A248495 A248496

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 07 2014

STATUS

approved

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Last modified September 26 09:15 EDT 2021. Contains 347664 sequences. (Running on oeis4.)