A284809 Write in base k, complement, reverse. Case k = 9.

8, 7, 6, 5, 4, 3, 2, 1, 0, 79, 70, 61, 52, 43, 34, 25, 16, 7, 78, 69, 60, 51, 42, 33, 24, 15, 6, 77, 68, 59, 50, 41, 32, 23, 14, 5, 76, 67, 58, 49, 40, 31, 22, 13, 4, 75, 66, 57, 48, 39, 30, 21, 12, 3, 74, 65, 56, 47, 38, 29, 20, 11, 2, 73, 64, 55, 46, 37, 28, 19

Offset: 0

Author

Paolo P. Lava, Apr 03 2017

Keywords

• nonn
• base
• easy

Examples

			a(14) = 34 because 14 in base 9 is 15, its complement in base 9 is 73 and the digit reverse is 37 that is 34 in base 10.
		

Crossrefs

Cf. A036044, A267193, A284810.

Programs

Maple

P:=proc(q,h) local a,b,k,n; print(h-1); for n from 1 to q do a:=convert(n,base,h); b:=0;
for k from 1 to nops(a) do a[k]:=h-1-a[k]; b:=h*b+a[k]; od; print(b); od; end: P(10^2,9);

Mathematica

Table[FromDigits[Reverse[8-#&/@IntegerDigits[n,9]],9],{n,0,70}] (* Harvey P. Dale, Mar 12 2023 *)