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A125476
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Number of base 19 circular n-digit numbers with adjacent digits differing by 9 or less.
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0
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1, 19, 271, 3439, 49051, 712519, 10458163, 154101799, 2274460507, 33592425049, 496277475271, 7332583525319, 108345196911631, 1600923503226079, 23655650115244789, 349542980141854759, 5164958667871471243
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OFFSET
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0,2
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COMMENTS
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[Empirical] a(base,n)=a(base-1,n)+F(9) for base>=9.int(n/2)+1 and F(d) is the largest coefficient in (1+x+...+x^(2d))^n
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LINKS
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PROG
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(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>9)+($[(i+1)mod N]`-$[i]`>9))
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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