A127916 Number of n-digit palindromes in bases 2 and 10. Also difference of A120764(n).

6, 2, 3, 2, 6, 1, 7, 1, 3, 2, 4, 2, 10, 1, 2, 2, 7, 2, 2, 3, 2, 0, 4, 0, 6, 1, 6, 1, 5, 1, 2, 0, 3

Offset

1,1

Links

Table of n, a(n) for n=1..33.

P. De Geest, Palindromic numbers beyond base 10

Charlton Harrison, Binary/Decimal Palindromes

Example

Palindromes in bases 2 and 10 are (A007632): 0, 1, 3, 5, 7, 9, 33, 99, 313, 585, 717, 7447, 9009, 15351, 32223... So a(1)=6 one-digit numbers, a(2)=2 two-digit palindromes and so on.

Crossrefs

Cf. A120764, A007632.

Sequence in context: A300892 A291359 A055942 * A165063 A307234 A371875

Adjacent sequences: A127913 A127914 A127915 * A127917 A127918 A127919

Keyword

base,nonn

Author

Anton Chupin (chupin(AT)icmm.ru), Apr 08 2007

Status

approved