A082744 Smallest k such that nk + 1 is a palindrome.
1, 1, 1, 1, 1, 1, 1, 1, 6, 1, 10, 10, 5, 7, 8, 2, 10, 3, 4, 5, 1, 5, 14, 5, 4, 5, 2, 5, 3, 4, 12, 1, 7, 5, 4, 5, 30, 2, 8, 3, 14, 12, 1, 8, 4, 7, 9, 30, 2, 2, 17, 6, 200, 1, 2, 7, 6, 16, 7, 2, 20, 6, 8, 265, 1, 9, 3, 8, 7, 2, 421, 7, 8, 15, 2, 1, 3, 4, 12, 2, 74, 7, 4, 6, 2, 135, 1, 4, 6, 2, 11000, 8
Offset: 1
Crossrefs
Cf. A082743.
Programs
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Mathematica
f[n_] := Block[{k = 1}, While[ FromDigits[ Reverse[ IntegerDigits[k*n + 1]]] != k*n + 1, k++ ]; k]; Table[ f[n], {n, 1, 92}]
Extensions
Edited and extended by Robert G. Wilson v, Apr 19 2003