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A227661 Number of lattice paths from {7}^n to {0}^n using steps that decrement one component by 1 such that for each point (p_1,p_2,...,p_n) we have abs(p_{i}-p_{i+1}) <= 1. 1
1, 1, 128, 896328, 69221669104, 31283451053916800, 57403822541579269311072, 337320253484345016223956919936, 5366698074745901061777599023075846976, 203989890816333447880297347963799273322740544, 16812841813975825541536765059695075768059296587720768 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..10.

EXAMPLE

a(2) = 2^7 = 128.

CROSSREFS

Row n=7 of A227655.

Cf. A000079.

Sequence in context: A069446 A227605 A016879 * A016939 A017011 A196995

Adjacent sequences:  A227658 A227659 A227660 * A227662 A227663 A227664

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Jul 19 2013

STATUS

approved

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Last modified July 15 16:09 EDT 2019. Contains 325049 sequences. (Running on oeis4.)