The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A253857 Number of (n+2) X (2+2) 0..1 arrays with every 3 X 3 subblock diagonal maximum plus antidiagonal minimum nondecreasing horizontally and vertically. 1
 3264, 30848, 291392, 2654464, 22951616, 196953728, 1698464064, 14584992256, 125182611904, 1074628170624, 9217329596480, 79050564905728, 678127033451712, 5816974582413440, 49896386833688384, 428003374084414464 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A253863. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 14*a(n-1) -46*a(n-2) -42*a(n-3) +624*a(n-4) -4070*a(n-5) +23726*a(n-6) -143310*a(n-7) +364913*a(n-8) +1129936*a(n-9) -6925152*a(n-10) +15765760*a(n-11) -48494080*a(n-12) +157092864*a(n-13) -333556224*a(n-14) +23502848*a(n-15) +1872896000*a(n-16) -4361814016*a(n-17) +12360941568*a(n-18) -45439909888*a(n-19) +98790080512*a(n-20) -104990769152*a(n-21) -49694113792*a(n-22) +350694146048*a(n-23) -1042871746560*a(n-24) +3605625044992*a(n-25) -7769595838464*a(n-26) +8796093022208*a(n-27) -4947802324992*a(n-28) +1099511627776*a(n-29). EXAMPLE Some solutions for n=2 ..1..0..0..0....1..0..1..1....0..1..0..1....1..1..1..0....0..1..1..1 ..1..0..0..1....0..1..1..1....1..0..0..0....0..1..1..0....1..1..1..0 ..1..0..1..1....1..1..1..0....1..0..0..1....0..1..0..1....0..0..0..1 ..0..1..1..0....1..1..0..0....1..0..0..1....0..1..1..0....1..0..1..1 CROSSREFS Cf. A253863. Sequence in context: A234653 A254492 A254485 * A358870 A337792 A251277 Adjacent sequences: A253854 A253855 A253856 * A253858 A253859 A253860 KEYWORD nonn AUTHOR R. H. Hardin, Jan 17 2015 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 28 05:47 EDT 2024. Contains 372902 sequences. (Running on oeis4.)