A139042 Composite numbers c for which A064287((c-1)/2)=1.

15, 39, 55, 87, 95, 111, 143, 159, 183, 295, 303, 319, 335, 407, 415, 447, 519, 535, 543, 551, 583, 591, 655, 695, 767, 807, 815, 879, 895, 951, 1007, 1047, 1055, 1079, 1119, 1135, 1167, 1263, 1383, 1391, 1527, 1623, 1639, 1671, 1703, 1711, 1735, 1839, 1895, 1903, 1919, 1943

Offset: 1

Author

Vladimir Shevelev, Jun 01 2008

Keywords

• nonn

Comments

Is there an n for which A006694((a(n)-1)/2) is not equal to 4?

Crossrefs

Cf. A064287, A006694, A001122.

Extensions

More terms (using A064287 b-file) from Michel Marcus, Dec 16 2018