cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-6 of 6 results.

A237385 Number of (n+1)X(1+1) 0..2 arrays colored with the maximum plus the upper median minus the minimum of every 2X2 subblock.

Original entry on oeis.org

81, 434, 2336, 12624, 68064, 366568, 1976940, 10657560, 57441532, 309578264, 1668794652, 8995139000, 48484851148, 261335232440, 1408647749404, 7592807398296, 40926289471308, 220597727495896, 1189054017281884
Offset: 1

Views

Author

R. H. Hardin, Feb 07 2014

Keywords

Comments

Column 1 of A237391

Examples

			Some solutions for n=5
..2..1....1..1....1..1....0..2....2..1....2..2....2..0....2..0....1..1....0..1
..0..0....2..1....1..1....2..1....2..0....1..2....2..1....0..0....2..0....2..1
..0..2....0..0....2..2....1..2....1..1....1..1....0..0....0..0....0..2....0..2
..0..2....0..2....1..0....1..1....1..0....0..2....1..1....0..2....1..1....0..0
..0..0....1..2....0..1....2..0....2..2....0..0....2..0....0..2....1..1....1..0
..0..1....0..1....2..2....2..1....1..1....1..2....2..2....1..0....0..1....1..2
		

Formula

Empirical: a(n) = 30*a(n-3) +349*a(n-4) +818*a(n-5) +3504*a(n-6) +7320*a(n-7) +9876*a(n-8) +18056*a(n-9) -14960*a(n-10) -63872*a(n-11) -133008*a(n-12) -307168*a(n-13) -194624*a(n-14) +71296*a(n-15) +344832*a(n-16) +1077248*a(n-17) +985088*a(n-18) -16384*a(n-19) -212992*a(n-20)

A237386 Number of (n+1)X(2+1) 0..2 arrays colored with the maximum plus the upper median minus the minimum of every 2X2 subblock.

Original entry on oeis.org

434, 3240, 24340, 183764, 1379886, 10406596, 78612538, 593121116, 4469323758, 33698637958, 254212599808, 1917348305880, 14457809113682, 109028076862576, 822269791408032, 6201236835251186, 46765472722995182, 352677245924001228
Offset: 1

Views

Author

R. H. Hardin, Feb 07 2014

Keywords

Comments

Column 2 of A237391

Examples

			Some solutions for n=4
..0..0..0....0..2..2....0..2..2....1..1..1....0..2..2....0..2..2....0..2..1
..2..1..1....1..1..0....1..1..0....0..0..2....2..1..2....0..2..2....0..0..0
..1..1..1....0..0..0....1..0..0....0..0..2....1..2..0....0..0..0....0..0..2
..1..1..2....0..1..2....0..0..0....0..1..1....1..1..1....1..0..0....2..0..1
..0..2..0....2..1..1....2..1..0....2..1..0....1..1..2....1..2..2....1..1..0
		

Formula

Empirical recurrence of order 58 (see link above)

A237387 Number of (n+1)X(3+1) 0..2 arrays colored with the maximum plus the upper median minus the minimum of every 2X2 subblock.

Original entry on oeis.org

2336, 24340, 255937, 2712486, 28732972, 306543648, 3277420369, 34947393232, 371861162189, 3961014934240, 42248068509857, 450395711854966, 4798902441248885, 51135372814961074, 545076380858554986
Offset: 1

Views

Author

R. H. Hardin, Feb 07 2014

Keywords

Comments

Column 3 of A237391

Examples

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

A237388 Number of (n+1) X (4+1) 0..2 arrays colored with the maximum plus the upper median minus the minimum of every 2 X 2 subblock.

Original entry on oeis.org

12624, 183764, 2712486, 41204198, 629612266, 9678405410, 148794944054, 2283761004002, 34983096932494, 536585050368130, 8240252282574750, 126487165848399856, 1940113960361065176, 29764767650582758670
Offset: 1

Views

Author

R. H. Hardin, Feb 07 2014

Keywords

Comments

Column 4 of A237391.

Examples

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

Crossrefs

Cf. A237391.

A237389 Number of (n+1)X(5+1) 0..2 arrays colored with the maximum plus the upper median minus the minimum of every 2X2 subblock.

Original entry on oeis.org

68064, 1379886, 28732972, 629612266, 14010191373, 312459028946, 6958669132771, 154932883163426, 3448837532977725, 76806151538720222, 1712576070422070546, 38161120519580829710, 850125433535786412045, 18935483294737011140248
Offset: 1

Views

Author

R. H. Hardin, Feb 07 2014

Keywords

Comments

Column 5 of A237391

Examples

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

A237390 Number of (n+1)X(6+1) 0..2 arrays colored with the maximum plus the upper median minus the minimum of every 2X2 subblock.

Original entry on oeis.org

366568, 10406596, 306543648, 9678405410, 312459028946, 10132738026198, 327566510834706, 10602029347323732, 343125940257145882
Offset: 1

Views

Author

R. H. Hardin, Feb 07 2014

Keywords

Comments

Column 6 of A237391

Examples

			Some solutions for n=1
..0..2..0..1..2..2..1....0..1..2..2..1..0..2....0..0..1..1..2..0..1
..2..0..1..0..0..0..1....1..0..1..0..1..1..1....0..0..1..1..0..2..1
		
Showing 1-6 of 6 results.