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A073990 Number of strings of length n over Z_6 with trace 3 and subtrace 1. 22
0, 0, 0, 24, 300, 1800, 9072, 48384, 272160, 1594080, 9722592, 60217344, 367960320, 2207761920, 13144674816, 78328332288, 468419708160, 2810518248960, 16894457846784, 101565116448768, 609985806796800, 3659790885120000, 21947538146863104, 131620960833896448 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
FORMULA
a(n; t, s) = a(n-1; t, s) + a(n-1; t+5, s+5t+1) + a(n-1; t+4, s+4t+4) + a(n-1; t+3, s+3t+3) + a(n-1; t+2, s+2t+2) + a(n-1; t+1, s+t+1) where t is the trace and s is the subtrace.
CROSSREFS
Sequence in context: A161931 A162366 A153782 * A056290 A056285 A162686
KEYWORD
easy,nonn
AUTHOR
Frank Ruskey and Nate Kube, Aug 16 2002
EXTENSIONS
Terms a(11) onward from Max Alekseyev, Apr 09 2013
STATUS
approved

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Last modified March 29 01:36 EDT 2024. Contains 371264 sequences. (Running on oeis4.)