login
A125352
Number of base 15 circular n-digit numbers with adjacent digits differing by 4 or less.
0
1, 15, 115, 735, 5435, 40965, 315991, 2469909, 19495747, 154956453, 1237813755, 9923510469, 79762415747, 642295225197, 5178982417003, 41798669030805, 337575342572995, 2727627544083901, 22046802610388635, 178241899736229829
OFFSET
0,2
COMMENTS
[Empirical] a(base,n)=a(base-1,n)+A025014(n+1) for base>=4.int(n/2)+1
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: A113527 A044728 A091347 * A126510 A328725 A331211
KEYWORD
nonn,base
AUTHOR
R. H. Hardin, Dec 28 2006
STATUS
approved