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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A239034 Number of 7Xn 0..2 arrays with no element equal to the sum of elements to its left or one plus the sum of the elements above it, modulo 3 1
 8, 64, 428, 2195, 9319, 33699, 107611, 311585, 833304, 2086074, 4936712, 11126665, 24022753, 49913047, 100179401, 194844297, 368222528, 677728244, 1217319704, 2137637135, 3675638019, 6197499195, 10259782783, 16695406105, 26732874536 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 7 of A239030 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = (1/1036800)*n^12 - (1961/39916800)*n^11 + (13339/7257600)*n^10 - (30521/725760)*n^9 + (583409/806400)*n^8 - (400873/44800)*n^7 + (86137751/1036800)*n^6 - (407381983/725760)*n^5 + (4957467353/1814400)*n^4 - (8367100109/907200)*n^3 + (515324983/25200)*n^2 - (185067023/6930)*n + 15601 for n>3 EXAMPLE Some solutions for n=5 ..2..0..0..0..0....2..0..0..0..0....2..0..0..0..0....2..0..0..0..0 ..2..0..0..0..0....1..2..2..0..0....1..2..2..0..0....2..0..0..0..0 ..1..0..0..2..2....2..1..1..2..2....2..1..1..2..2....1..2..2..0..0 ..2..0..0..1..2....1..0..0..2..2....1..2..2..1..2....2..1..1..2..2 ..1..0..2..2..0....2..0..0..1..1....2..1..1..0..0....1..2..2..1..1 ..1..0..2..1..0....2..0..0..1..1....2..0..0..0..0....1..2..2..0..0 ..2..0..1..2..0....1..0..0..0..0....1..2..2..0..1....2..0..1..2..0 CROSSREFS Sequence in context: A181214 A283859 A222446 * A213296 A223564 A146885 Adjacent sequences: A239031 A239032 A239033 * A239035 A239036 A239037 KEYWORD nonn AUTHOR R. H. Hardin, Mar 09 2014 STATUS approved

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

Last modified May 29 18:27 EDT 2023. Contains 363042 sequences. (Running on oeis4.)