A369656 Numbers k such that k' is odd and also k'' is odd, where k' stands for the arithmetic derivative of k, A003415(k).

6, 10, 22, 27, 30, 34, 42, 50, 58, 66, 70, 78, 82, 86, 99, 105, 114, 118, 122, 125, 126, 130, 142, 146, 154, 165, 174, 182, 194, 202, 206, 207, 214, 222, 230, 231, 238, 242, 243, 246, 250, 255, 273, 274, 279, 282, 285, 286, 298, 302, 310, 318, 326, 333, 343, 345, 346, 357, 358, 366, 369, 370, 374, 382, 385, 386

Offset: 1

Author

Antti Karttunen, Feb 05 2024

Keywords

• nonn

Comments

Numbers k that are in A235991 and also A003415(k) is in A235991.

Crossrefs

Cf. A000035, A003415, A068346, A235991, A351228, A369655 (characteristic function).

Programs

PARI

\\ See A369655.