A287961 Numbers that are the sum of two palindromic primes (A002385).

4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 16, 18, 22, 103, 104, 106, 108, 112, 133, 134, 136, 138, 142, 153, 154, 156, 158, 162, 183, 184, 186, 188, 192, 193, 194, 196, 198, 202, 232, 252, 262, 282, 292, 302, 312, 315, 316, 318, 320, 322, 324, 332, 342, 355, 356, 358, 360, 362, 364, 372, 375, 376, 378, 380

Offset

1,1

Links

Table of n, a(n) for n=1..64.

Eric Weisstein's World of Mathematics, Palindromic Prime

Index entries for sequences related to palindromes

Mathematica

nmax = 380; f[x_] := Sum[Boole[PalindromeQ[k] && PrimeQ[k]] x^k, {k, 1, nmax}]^2; Exponent[#, x] & /@ List @@ Normal[Series[f[x], {x, 0, nmax}]]

Crossrefs

Cf. A002113, A002385, A014091, A035137, A260254, A260255, A261906.

Sequence in context: A239433 A014091 A308040 * A030791 A306298 A227763

Adjacent sequences: A287958 A287959 A287960 * A287962 A287963 A287964

Keyword

nonn,base

Author

Ilya Gutkovskiy, Jun 03 2017

Status

approved