A235901 Number of (n+1)X(7+1) 0..2 arrays with the minimum plus the maximum equal to the lower median plus the upper median in every 2X2 subblock

100457, 2633969, 51386977, 1221438401, 26681279873, 632701301249, 14843231431681, 363748742848769, 9042403764456449, 231698339089654529, 6060781113997152769, 162356984594605584641, 4435208889979212623873

Offset

1,1

Comments

Column 7 of A235902

Links

R. H. Hardin, Table of n, a(n) for n = 1..206

Formula

Empirical: a(n) = 105*a(n-1) -2912*a(n-2) -48360*a(n-3) +3284176*a(n-4) -9849840*a(n-5) -1413681152*a(n-6) +11064890880*a(n-7) +342354927616*a(n-8) -2914586849280*a(n-9) -53197229588480*a(n-10) +326026026024960*a(n-11) +5257932711133184*a(n-12) -9378006313205760*a(n-13) -253932398608121856*a(n-14) -671129571038330880*a(n-15)

Example

Some solutions for n=1
..0..1..0..1..1..1..1..0....2..1..2..1..0..1..1..0....2..0..2..1..2..1..2..0
..1..2..1..2..2..0..2..1....1..2..1..0..1..0..2..1....2..0..2..1..2..1..2..0

Crossrefs

Sequence in context: A120217 A120218 A365375 * A251171 A126166 A323754

Adjacent sequences: A235898 A235899 A235900 * A235902 A235903 A235904

Keyword

nonn

Author

R. H. Hardin, Jan 16 2014

Status

approved