A354938 - OEIS

A354938

Row 8 of A354940: Numbers k for which A345992(k) = 8, divided by 8.

3, 9, 11, 17, 19, 25, 27, 33, 41, 43, 49, 57, 59, 67, 73, 81, 83, 89, 97, 105, 107, 113, 121, 129, 131, 137, 139, 145, 161, 163, 169, 177, 179, 185, 193, 201, 209, 211, 217, 225, 227, 233, 241, 243, 249, 251, 257, 281, 283, 289, 297, 305, 307, 313, 321, 329, 331, 337, 345, 347, 353, 361, 377, 379, 393, 401, 409, 417

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OFFSET

1,1

COMMENTS

Apparently, all terms are either of the form 8k+1 (in A017077) or 8k+3 (in A017101).

LINKS

Table of n, a(n) for n=1..68.

MATHEMATICA

q[n_] := Module[{m = 1}, While[!Divisible[m*(m + 1), 8*n], m++]; GCD[8*n, m] == 8]; Select[Range[420], q] (* Amiram Eldar, Jun 17 2022 *)

PROG

(PARI) A354938(n) = A354940sq(8, n);

CROSSREFS