A288535 Array RATS(b,n) by upward antidiagonals: Reverse Add Then Sort digits of n>0 in base b>1.

1, 2, 3, 2, 4, 3, 2, 1, 4, 3, 2, 4, 6, 8, 3, 2, 4, 6, 5, 4, 3, 2, 4, 1, 8, 10, 8, 7, 2, 4, 6, 8, 6, 15, 4, 3, 2, 4, 6, 8, 10, 12, 5, 14, 3, 2, 4, 6, 1, 10, 7, 18, 10, 4, 15, 2, 4, 6, 8, 10, 12, 14, 24, 15, 8, 3, 2, 4, 6, 8, 10, 12, 8, 21, 6, 5, 4, 15, 2, 4, 6

Offset

2,2

Links

Table of n, a(n) for n=2..82.

J. Thiel, On RATS sequences in general bases, Integers, 14 (2014), #A50.

Index entries for sequences related to RATS: Reverse, Add Then Sort

Example

17 in base 3 is 122, 122+221=1120->112 which is 14 in decimal, thus RATS(3,17)=14.
The array begins:
1, 3, 3, 3,  3,  3,  7, ...
2, 4, 4, 8,  4,  8,  4, ...
2, 1, 6, 5, 10, 15,  5, ...
2, 4, 6, 8,  6, 12, 18, ...
2, 4, 1, 8, 10,  7, 14, ...

Mathematica

rats[n_, b_: 10] := FromDigits[Sort[IntegerDigits[n + FromDigits[Reverse[IntegerDigits[n, b]], b], b]], b];
Flatten[Table[rats[n, s + 2 - n], {s, 20}, {n, s}]]

Crossrefs

Cf. A004000, A036839 (row 10), A191780, A288536, A288537.

Sequence in context: A339749 A277859 A308566 * A105117 A100876 A089215

Adjacent sequences: A288532 A288533 A288534 * A288536 A288537 A288538

Keyword

nonn,tabl,base,easy

Author

Andrey Zabolotskiy, Jun 11 2017

Status

approved