The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A203934 T(n,k)=Number of (n+1)X(k+1) 0..5 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements 9
 396, 4356, 4356, 47916, 106596, 47916, 527076, 2543436, 2543436, 527076, 5797836, 60873876, 140120856, 60873876, 5797836, 63776196, 1456391916, 7748585676, 7748585676, 1456391916, 63776196, 701538156, 34845401556, 428652828396 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ........396...........4356.............47916................527076 .......4356.........106596...........2543436..............60873876 ......47916........2543436.........140120856............7748585676 .....527076.......60873876........7748585676.........1012872412476 ....5797836.....1456391916......428652828396.......132923754354276 ...63776196....34845401556....23714024087016.....17475349695161076 ..701538156...833700866796..1311917257647036...2297197186864332876 .7716919716.19946896311636.72578467770478956.302046352349437619676 LINKS R. H. Hardin, Table of n, a(n) for n = 1..84 FORMULA Empirical for row k: k=1: a(n) = 36*11^n k=2: a(n) = 21*a(n-1) +70*a(n-2) k=3: a(n) = 61*a(n-1) -315*a(n-2) +50*a(n-3) k=4: a(n) = 91*a(n-1) +7335*a(n-2) -264625*a(n-3) -85500*a(n-4) +10470000*a(n-5) +2475000*a(n-6) -20750000*a(n-7) k=5: (order 12 recurrence) EXAMPLE Some solutions for n=4 k=3 ..3..1..5..2....5..4..3..2....1..1..0..4....3..4..0..5....1..0..3..3 ..0..3..1..5....1..5..4..3....5..1..1..0....2..3..4..0....3..1..0..3 ..3..5..3..1....4..1..5..4....1..4..1..1....5..2..3..4....0..3..1..0 ..1..3..3..3....4..4..1..5....2..1..3..1....5..5..2..3....3..2..3..1 ..2..1..3..5....2..4..4..1....0..2..1..3....1..5..5..2....1..3..4..3 CROSSREFS Sequence in context: A275171 A028299 A205628 * A203927 A205330 A092720 Adjacent sequences:  A203931 A203932 A203933 * A203935 A203936 A203937 KEYWORD nonn,tabl AUTHOR R. H. Hardin Jan 08 2012 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 January 26 22:05 EST 2022. Contains 350601 sequences. (Running on oeis4.)