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A207098 Number of 0..6 arrays x(0..n-1) of n elements with each no smaller than the sum of its two previous neighbors modulo 7 1
7, 28, 112, 462, 1904, 7868, 32531, 134517, 556259, 2300219, 9511719, 39332200, 162643507, 672550879, 2781080236, 11500107101, 47554350602, 196643061212, 813143132135, 3362446402726, 13904127534002, 57495269615906 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A207100

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 4*a(n-1) +3*a(n-2) -9*a(n-3) -8*a(n-4) +12*a(n-5) +11*a(n-6) -6*a(n-7) +5*a(n-8) -2*a(n-9) -17*a(n-10) +3*a(n-11) -4*a(n-12) -4*a(n-13) +a(n-14) -2*a(n-15) +9*a(n-16) -12*a(n-17) -a(n-18) +10*a(n-19) -19*a(n-20) -9*a(n-21) +7*a(n-22) -4*a(n-23) -3*a(n-24) +4*a(n-25) +14*a(n-26) +5*a(n-28) +11*a(n-29) +a(n-30) -a(n-31) -a(n-32) +8*a(n-33) +2*a(n-34) -a(n-35) +5*a(n-36) -2*a(n-37) -2*a(n-38) -a(n-40) -3*a(n-42) -a(n-43) -a(n-44) -a(n-49)

EXAMPLE

Some solutions for n=5

..2....5....1....2....3....4....5....1....4....4....0....0....1....0....0....4

..6....5....1....3....3....6....5....4....4....5....0....2....3....2....3....6

..6....3....5....6....6....3....4....6....5....2....0....6....4....2....5....4

..6....4....6....5....2....5....4....5....4....1....5....3....2....6....3....6

..5....2....4....4....4....3....5....4....6....3....6....5....6....3....1....3

CROSSREFS

Sequence in context: A200467 A002042 A200666 * A037597 A037702 A302523

Adjacent sequences:  A207095 A207096 A207097 * A207099 A207100 A207101

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 15 2012

STATUS

approved

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Last modified September 23 13:34 EDT 2020. Contains 337310 sequences. (Running on oeis4.)