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 1-8 of 8 results.

A205587 Number of (n+1)X6 0..2 arrays with no 2X2 subblock having the same number of equal edges as its horizontal or vertical neighbors, and new values 0..2 introduced in row major order.

Original entry on oeis.org

12574, 248940, 6127845, 147377704, 3619876639, 88339585116, 2185708696857, 53385992474116, 1322383286558544, 32335854186137718, 800647385900917353, 19592761418771490008, 484877507851310339810, 11872137202509501621294
Offset: 1

Views

Author

R. H. Hardin Jan 29 2012

Keywords

Comments

Column 5 of A205590

Examples

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

A205583 Number of (n+1) X 2 0..2 arrays with no 2 X 2 subblock having the same number of equal edges as its horizontal or vertical neighbors, and new values 0..2 introduced in row major order.

Original entry on oeis.org

14, 74, 413, 2268, 12574, 69338, 383440, 2117054, 11699556, 64620690, 357034452, 1972284262, 10896200940, 60194058786, 332543162084, 1837101323030, 10149009487404, 56067475332178, 309742091323076, 1711151039052838
Offset: 1

Views

Author

R. H. Hardin, Jan 29 2012

Keywords

Comments

Column 1 of A205590.

Examples

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

Crossrefs

Cf. A205590.

Formula

Empirical: a(n) = 21*a(n-2) + 44*a(n-3) + 50*a(n-4) + 12*a(n-5) - 144*a(n-6) for n>7.
Empirical g.f.: x*(14 + 74*x + 119*x^2 + 98*x^3 - 55*x^4 - 330*x^5 + 72*x^6) / (1 - 21*x^2 - 44*x^3 - 50*x^4 - 12*x^5 + 144*x^6). - Colin Barker, Mar 04 2018

A205584 Number of (n+1) X 3 0..2 arrays with no 2 X 2 subblock having the same number of equal edges as its horizontal or vertical neighbors, and new values 0..2 introduced in row major order.

Original entry on oeis.org

74, 550, 4220, 32500, 248940, 1910922, 14668206, 112560786, 863863526, 6629842280, 50880821560, 390488098388, 2996825524800, 22999305690670, 176509524902826, 1354632729727342, 10396208030732474, 79786307537199012
Offset: 1

Views

Author

R. H. Hardin, Jan 29 2012

Keywords

Comments

Column 2 of A205590.

Examples

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

Crossrefs

Cf. A205590.

Formula

Empirical: a(n) = 3*a(n-1) +24*a(n-2) +82*a(n-3) +83*a(n-4) -107*a(n-5) +30*a(n-6) +250*a(n-7).
Empirical g.f.: 2*x*(37 + 164*x + 397*x^2 + 286*x^3 - 541*x^4 + 165*x^5 + 1125*x^6) / (1 - 3*x - 24*x^2 - 82*x^3 - 83*x^4 + 107*x^5 - 30*x^6 - 250*x^7). - Colin Barker, Jun 12 2018

A205585 Number of (n+1)X4 0..2 arrays with no 2X2 subblock having the same number of equal edges as its horizontal or vertical neighbors, and new values 0..2 introduced in row major order.

Original entry on oeis.org

413, 4220, 48401, 541966, 6127845, 68604790, 776680394, 8702185466, 98398332311, 1103927071962, 12468958815761, 140015466501204, 1580270353473531, 17756867239461678, 200295188074165090, 2251768811108327634
Offset: 1

Views

Author

R. H. Hardin Jan 29 2012

Keywords

Comments

Column 3 of A205590

Examples

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

Formula

Empirical: a(n) = 152*a(n-2) +54*a(n-3) -4718*a(n-4) +5948*a(n-5) +58946*a(n-6) -19436*a(n-7) -1353480*a(n-8) +2542842*a(n-9) +9556078*a(n-10) -27865096*a(n-11) -65567168*a(n-12) +254406326*a(n-13) +71727865*a(n-14) -538337356*a(n-15) -2112406171*a(n-16) +4588110792*a(n-17) +4795025038*a(n-18) -5327969682*a(n-19) -17161759910*a(n-20) +7334884278*a(n-21) +21326735730*a(n-22) -133698908778*a(n-23) -70192339665*a(n-24) +411425826402*a(n-25) +1019951533925*a(n-26) -607446842940*a(n-27) -960447744408*a(n-28) -490203083736*a(n-29) -1614395098494*a(n-30) +3156004549890*a(n-31) +14423374001987*a(n-32) +2510729034060*a(n-33) -52628366908930*a(n-34) -13565106506052*a(n-35) +105837336195065*a(n-36) +62664755841178*a(n-37) -211447917300772*a(n-38) -114559785207888*a(n-39) +303103511948806*a(n-40) +68047189338132*a(n-41) -278114921604090*a(n-42) -53370728860004*a(n-43) +269127801384484*a(n-44) -19936594110316*a(n-45) -164006197905600*a(n-46) +4781667715064*a(n-47) +109575138387544*a(n-48) -16919294438944*a(n-49) -43656348058176*a(n-50) +5987177976704*a(n-51) +16442801335744*a(n-52) -4958077313728*a(n-53) -1892648379136*a(n-54) +765080068864*a(n-55) +35571732480*a(n-56) -31503759360*a(n-57) +8522973184*a(n-58) -427900928*a(n-59) -502136832*a(n-60) for n>61

A205586 Number of (n+1)X5 0..2 arrays with no 2X2 subblock having the same number of equal edges as its horizontal or vertical neighbors, and new values 0..2 introduced in row major order.

Original entry on oeis.org

2268, 32500, 541966, 8952876, 147377704, 2444556894, 40477518336, 670667507098, 11114946907896, 184190072876610, 3052516512565604, 50588130338625662, 838377567411023378, 13894165181215493800, 230263463379558919982
Offset: 1

Views

Author

R. H. Hardin Jan 29 2012

Keywords

Comments

Column 4 of A205590

Examples

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

A205588 Number of (n+1)X7 0..2 arrays with no 2X2 subblock having the same number of equal edges as its horizontal or vertical neighbors, and new values 0..2 introduced in row major order.

Original entry on oeis.org

69338, 1910922, 68604790, 2444556894, 88339585116, 3232900348158, 118372688297292, 4345040364362660, 159636203824214264, 5867029054299935636, 215694158623613862786, 7930473571089262834558, 291601723075905716037696
Offset: 1

Views

Author

R. H. Hardin Jan 29 2012

Keywords

Comments

Column 6 of A205590

Examples

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

A205582 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having the same number of equal edges as its horizontal or vertical neighbors, and new values 0..2 introduced in row major order.

Original entry on oeis.org

14, 550, 48401, 8952876, 3619876639, 3232900348158
Offset: 1

Views

Author

R. H. Hardin Jan 29 2012

Keywords

Comments

Diagonal of A205590

Examples

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

A205589 Number of (n+1)X8 0..2 arrays with no 2X2 subblock having the same number of equal edges as its horizontal or vertical neighbors, and new values 0..2 introduced in row major order.

Original entry on oeis.org

383440, 14668206, 776680394, 40477518336, 2185708696857, 118372688297292
Offset: 1

Views

Author

R. H. Hardin Jan 29 2012

Keywords

Comments

Column 7 of A205590

Examples

			Some solutions for n=4
..0..1..0..2..1..2..1..2....0..1..0..2..1..2..2..1....0..0..1..2..2..1..2..2
..2..1..0..1..2..2..0..1....1..0..0..1..0..0..2..0....1..0..2..1..1..2..2..2
..0..2..2..0..2..2..0..2....0..0..0..1..2..2..0..0....1..2..0..1..1..1..0..0
..2..2..2..2..0..1..2..2....2..1..0..2..1..0..0..0....0..1..1..2..1..1..0..0
..0..1..2..2..1..2..2..2....1..2..2..2..0..0..0..1....0..1..1..2..0..0..1..0
		
Showing 1-8 of 8 results.