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

1,1

Comments

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

Links

Table of n, a(n) for n=1..69.

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 *)

Prog

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

Crossrefs

Row 9 of A354940.

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

Sequence in context: A152001 A297000 A356218 * A282107 A022441 A156243

Adjacent sequences: A354936 A354937 A354938 * A354940 A354941 A354942

Keyword

nonn

Author

Antti Karttunen, Jun 15 2022

Status

approved