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.

A224157 Number of nX7 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.

Original entry on oeis.org

29, 267, 1252, 4339, 13283, 39037, 114537, 340134, 1025559, 3143071, 9794989, 31018972, 99708260, 324764638, 1069736878, 3556096357, 11908005965, 40101772888, 135631552056, 460218357877, 1565350043268, 5333698073679
Offset: 1

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Author

R. H. Hardin Mar 31 2013

Keywords

Comments

Column 7 of A224158

Examples

			Some solutions for n=3
..1..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..1..1
..0..1..0..0..0..0..0....0..0..0..0..0..1..0....0..0..0..1..1..1..1
..1..1..1..1..0..0..0....1..1..1..1..1..0..0....0..0..1..1..1..1..1
		

Formula

Empirical: a(n) = 8*a(n-1) -20*a(n-2) +11*a(n-3) +13*a(n-4) +18*a(n-5) -83*a(n-6) +98*a(n-7) -99*a(n-8) +159*a(n-9) -264*a(n-10) +312*a(n-11) -324*a(n-12) +647*a(n-13) -757*a(n-14) +88*a(n-15) +283*a(n-16) -257*a(n-17) -451*a(n-18) +365*a(n-19) -1074*a(n-20) +477*a(n-21) -1092*a(n-22) +258*a(n-23) -916*a(n-24) -142*a(n-25) +114*a(n-26) +202*a(n-27) +118*a(n-28) -56*a(n-29) +56*a(n-30) -24*a(n-31) +8*a(n-32) -8*a(n-33) for n>37