The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A198408 T(n,k) = Number of 2n X 2k 0..4 arrays with values 0..4 introduced in row major order and each element equal to exactly one horizontal and vertical neighbor. 4
 2, 17, 17, 377, 6986, 377, 11473, 5057327, 5057327, 11473, 375273, 3850206168, 85013617830, 3850206168, 375273, 12456897, 2970439193698, 1506130430723528, 1506130430723528, 2970439193698, 12456897, 414711897, 2302126761338667 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts: ........2............17..............377............11473...............375273 .......17..........6986..........5057327.......3850206168........2970439193698 ......377.......5057327......85013617830.1506130430723528.27330079651426584414 ....11473....3850206168.1506130430723528 ...375273.2970439193698 .12456897 LINKS R. H. Hardin, Table of n, a(n) for n = 1..24 EXAMPLE Some solutions for n=2, k=2: ..0..0..1..1....0..1..2..2....0..0..1..1....0..1..2..3....0..0..1..1 ..1..1..0..0....0..1..3..4....2..2..3..3....0..1..2..3....2..2..3..3 ..2..3..3..4....4..0..3..4....3..1..1..2....1..3..0..4....1..3..2..2 ..2..0..0..4....4..0..2..2....3..0..0..2....1..3..0..4....1..3..4..4 CROSSREFS Sequence in context: A153652 A198290 A198596 * A198534 A032936 A263329 Adjacent sequences:  A198405 A198406 A198407 * A198409 A198410 A198411 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Oct 24 2011 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified April 17 02:26 EDT 2021. Contains 343059 sequences. (Running on oeis4.)