A125349 Number of base 12 circular n-digit numbers with adjacent digits differing by 4 or less.

1, 12, 88, 552, 3968, 29112, 218008, 1650528, 12582880, 96324600, 739228968, 5681576176, 43706415776, 336396570496, 2589969578592, 19944309195072, 153600126376320, 1183021908352864, 9111943178894368, 70184192846874336

Offset

0,2

Comments

[Empirical] a(base,n)=a(base-1,n)+A025014(n+1) for base>=4.int(n/2)+1

Links

Table of n, a(n) for n=0..19.

Prog

(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>4)+($[(i+1)mod N]`-$[i]`>4))

Crossrefs

Sequence in context: A082814 A178257 A057406 * A164608 A081009 A155635

Adjacent sequences: A125346 A125347 A125348 * A125350 A125351 A125352

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved