This site is supported by donations to The OEIS Foundation.

"Email this user" was broken Aug 14 to 9am Aug 16. If you sent someone a message in this period, please send it again.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A073973 Number of strings of length n over Z_6 with trace 0 and subtrace 2. 22
 0, 2, 6, 24, 180, 1440, 9072, 50544, 286416, 1658880, 9722592, 58335552, 356638464, 2179768320, 13180786560, 79012495872, 472093588224, 2821539889152, 16894457846784, 101356447675392, 608733733690368, 3656096522698752, 21947538146863104, 131685228881178624 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Max Alekseyev, PARI/GP scripts for miscellaneous math problems 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, A073974, A073975, A073976, A073977, A073978, A073979, A073980, A073981, A073982, A073983. Cf. A073984, A073985, A073986, A073987, A073988, A073989, A073990, A073991, A073992, A073993, A073994. Sequence in context: A012361 A121773 A012711 * A034874 A052699 A074351 Adjacent sequences:  A073970 A073971 A073972 * A073974 A073975 A073976 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.