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A262795 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each row divisible by 5 and column not divisible by 5, read as a binary number with top and left being the most significant bits. 15
0, 36, 0, 76, 144, 0, 344, 528, 625, 0, 2178, 4704, 4898, 2601, 0, 15556, 56880, 81954, 38688, 10404, 0, 82386, 787536, 2070492, 1217748, 269638, 41616, 0, 479148, 8423568, 53647609, 62476744, 15883746, 1873728, 167281, 0, 2894976, 98893920 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Table starts
.0.......36.........76..........344...........2178...........15556
.0......144........528.........4704..........56880..........787536
.0......625.......4898........81954........2070492........53647609
.0.....2601......38688......1217748.......62476744......3232334529
.0....10404.....269638.....15883746.....1628730346....167631328804
.0....41616....1873728....207296448....42425454480...8709248924880
.0...167281...13349904...2745709200..1124519007690.461326213311625
.0...670761...94039306..36033729098.29517820715106
.0..2683044..656071804.468737604632
.0.10732176.4575740208
LINKS
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: [order 8]
k=3: [order 53]
Empirical for row n:
n=1: [linear recurrence of order 30]
n=2: [order 31]
EXAMPLE
Some solutions for n=3 k=4
..1..1..0..0..1..0....1..0..0..0..1..1....1..0..1..0..0..0....0..0..1..1..1..1
..1..0..1..0..0..0....1..1..0..0..1..0....0..0..1..1..1..1....0..0..0..1..0..1
..0..1..1..0..0..1....0..1..1..1..1..0....0..1..1..0..0..1....1..1..0..0..1..0
..1..1..0..1..1..1....1..0..1..1..0..1....0..1..1..0..0..1....1..0..0..0..1..1
..1..0..0..0..1..1....0..1..1..1..1..0....1..1..1..1..0..0....1..0..0..0..1..1
CROSSREFS
Sequence in context: A167264 A292156 A265489 * A309379 A022071 A181635
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Oct 02 2015
STATUS
approved

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)