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 A073988 Number of strings of length n over Z_6 with trace 2 and subtrace 5. 22
 0, 0, 9, 72, 300, 1296, 7056, 42336, 262440, 1658880, 10349856, 62355744, 367960320, 2173796352, 12958657344, 77787495936, 468419708160, 2821109907456, 16960580969472, 101763485816832, 609954817881600, 3656096522698752, 21926115464435712, 131557435432187904 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Same as the number of strings of length n over Z_6 with trace 4 and subtrace 5. LINKS Table of n, a(n) for n=1..24. Max Alekseyev, PARI/GP scripts for miscellaneous math problems F. Ruskey Strings over Z_6 with given trace and subtrace 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 Cf. A073971, A073972, A073973, A073974, A073975, A073976, A073977, A073978, A073979, A073980, A073981, A073982, A073983, A073984, A073985, A073986, A073987, A073989, A073990, A073991, A073992, A073993, A073994. Sequence in context: A244728 A069978 A070823 * A005778 A288351 A319892 Adjacent sequences: A073985 A073986 A073987 * A073989 A073990 A073991 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 September 7 17:00 EDT 2024. Contains 375749 sequences. (Running on oeis4.)