A135634 Palindromes formed from the reflected decimal expansion of e.

2, 22, 272, 2772, 27172, 271172, 2718172, 27188172, 271828172, 2718228172, 27182828172, 271828828172, 2718281828172, 27182811828172, 271828181828172, 2718281881828172, 27182818281828172, 271828182281828172

Offset: 1

Author

Omar E. Pol, Mar 01 2008, Mar 28 2008

Keywords

• base
• nonn

Comments

e = 2.71828182845904523536028747135... (See A001113).

The number of digits of a(n) is equal to n.

Examples

			n ... Successive digits of a(n)
1 ............ ( 2 )
2 ........... ( 2 2 )
3 .......... ( 2 7 2 )
4 ......... ( 2 7 7 2 )
5 ........ ( 2 7 1 7 2 )
6 ....... ( 2 7 1 1 7 2 )
7 ...... ( 2 7 1 8 1 7 2 )
8 ..... ( 2 7 1 8 8 1 7 2 )
9 .... ( 2 7 1 8 2 8 1 7 2 )
10 .. ( 2 7 1 8 2 2 8 1 7 2 )
		

Crossrefs

Cf. A001113, A002113.

Cf. A138068, A138069.