A168647 Reverse (palindrome) of A164844.

1, 1, 1, 1, 11, 1, 1, 21, 111, 1, 1, 31, 321, 1111, 1, 1, 41, 631, 4321, 11111, 1, 1, 51, 51, 731, 54321, 111111, 1, 1, 61, 561, 251, 51731, 654321, 1111111, 1, 1, 71, 181, 5861, 53251, 171731, 7654321, 11111111, 1, 1, 81, 891, 6681, 2961, 604251, 8371731, 87654321, 111111111, 1

Offset

0,5

Links

Table of n, a(n) for n=0..54.

Formula

T(n,k) = A004086(A164844(n,k)).

Example

1
1,1
1,11,1
1,21,111,1
1,31,321,1111,1
1,41,631,4321,11111,1

Crossrefs

Cf. A004086, A164844.

Sequence in context: A105769 A157171 A143685 * A202767 A060270 A202678

Adjacent sequences: A168644 A168645 A168646 * A168648 A168649 A168650

Keyword

nonn,tabl,base

Author

Mark Dols, Dec 01 2009

Extensions

a(24) onward corrected by Georg Fischer, Apr 08 2022

Status

approved