A352305 a(n) is the (conjectured) largest even number that can be expressed as the sum of two distinct primes in exactly n ways.

6, 38, 68, 128, 158, 188, 398, 362, 458, 542, 632, 692, 602, 992, 808, 908, 1112, 1238, 1412, 1418, 1718, 1544, 1574, 1622, 1682, 2048, 2252, 2018, 2672, 2042, 2558, 2936, 2504, 2978, 2966, 3092, 3218, 3242, 3272, 3506, 3632, 3754, 4022, 4058, 4052, 4412, 4448, 4478

Offset

0,1

Links

Table of n, a(n) for n=0..47.

Example

a(5) = 188 because 188 = 7 + 181 = 31 + 157 = 37 + 151 = 61 + 127 = 79 + 109 and it is conjectured that 188 is the last term of A080854.

Crossrefs

Cf. A000954, A038609, A061357, A077914, A077969, A078299, A080854, A080862, A087747, A117929, A212613.

Sequence in context: A055713 A216384 A360739 * A060454 A060452 A229620

Adjacent sequences: A352302 A352303 A352304 * A352306 A352307 A352308

Keyword

nonn

Author

Ilya Gutkovskiy, Mar 11 2022

Extensions

More terms from Hugo Pfoertner, Dec 18 2024

Status

approved