A062935 Palindromes of the form n! + 1.

2, 3, 7, 121

Offset

1,1

Links

Table of n, a(n) for n=1..4.

Example

121 = 5! + 1.

Mathematica

Select[Range[10]!+1, PalindromeQ] (* Harvey P. Dale, Apr 17 2022 *)

Prog

(Python)
A062935_list, n = [], 1
for i in range(1, 10**3):
....n *= i
....s = str(n+1)
....if s == s[::-1]:
........A062935_list.append(n+1) # Chai Wah Wu, Dec 03 2014

Crossrefs

Sequence in context: A230778 A111870 A182514 * A083436 A088856 A173913

Adjacent sequences: A062932 A062933 A062934 * A062936 A062937 A062938

Keyword

nonn,base

Author

Amarnath Murthy, Jul 05 2001

Extensions

Comment from Dean Hickerson, Jul 06 2001: I doubt that there are any more terms, but I see no hope of proving that. If there are any more terms, they're too large to fit.

Status

approved