A125367 Number of base 30 circular n-digit numbers with adjacent digits differing by 4 or less.

1, 30, 250, 1650, 12770, 100230, 805906, 6566814, 54086114, 449108706, 3753661210, 31540650842, 266200099346, 2255103585986, 19164991781962, 163321999341570, 1395146780098946, 11942807195629546, 102422953911204100

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..18.

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: A334981 A230703 A024448 * A126525 A230615 A230731

Adjacent sequences: A125364 A125365 A125366 * A125368 A125369 A125370

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved