A354939 Row 9 of A354940: Numbers k for which A345992(k) = 9, divided by 9.

5, 7, 10, 14, 16, 19, 23, 25, 28, 32, 37, 41, 43, 46, 50, 59, 61, 64, 68, 73, 79, 82, 86, 91, 97, 100, 109, 113, 118, 122, 127, 131, 136, 145, 149, 151, 158, 163, 167, 169, 172, 181, 185, 194, 199, 212, 221, 223, 226, 235, 239, 241, 244, 253, 257, 262, 271, 277, 289, 293, 298, 302, 307, 311, 313, 316, 325, 331, 334

Offset: 1

Author

Antti Karttunen, Jun 15 2022

Keywords

• nonn

Comments

Apparently, all terms are either of the form 9k+1 (in A017173), or 9k+5 (in A017221), or 9k+7 (in A017245).

Crossrefs

Row 9 of A354940.

Cf. A017173, A017221, A017245, A344005, A345992.

Programs

Mathematica

q[n_] := Module[{m = 1}, While[!Divisible[m*(m + 1), 9*n], m++]; GCD[9*n, m] == 9]; Select[Range[335], q] (* Amiram Eldar, Jun 17 2022 *)

PARI

A354939(n) = A354940sq(9,n); \\ See the program in A354940.