A206459 Number of 0..n arrays of length n+5 avoiding the consecutive pattern 0..n

7, 1791, 64257, 1950000, 60459696, 1977314738, 68719456256, 2541865795524, 99999999950000, 4177248169342446, 184884258894932736, 8650415919381195128, 426878854210636550576, 22168378200531005606250, 1208925819614629174378496

Offset

1,1

Comments

Subdiagonal 5 of A206455

Links

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

Formula

Empirical: a(n) = sum{i in 0..floor((n+5)/(n+1))} ((-1)^i*(n+1)^((n+5) -(n+1)*i)*binomial((n+5) -n*i,i))

Crossrefs

Sequence in context: A001424 A055318 A117661 * A172937 A185407 A332303

Adjacent sequences: A206456 A206457 A206458 * A206460 A206461 A206462

Keyword

nonn

Author

R. H. Hardin Feb 07 2012

Status

approved