OFFSET
1,2
LINKS
Chai Wah Wu, Table of n, a(n) for n = 1..20000 (terms 1..156 from N. J. A. Sloane, terms 157..420 from Michel Marcus).
MATHEMATICA
Array[(k=1; n=1; While[m=1; While[!Divisible[m(m+1), n], m++]; m!=#, n++]; n)&, 70] (* Giorgos Kalogeropoulos, Jul 29 2021 *)
PROG
(PARI) f(n) = my(m=1); while (m*(m+1) %n, m++); m; \\ A344005
a(n) = my(k=1); while (f(k) !=n, k++); k; \\ Michel Marcus, Jul 29 2021
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert Dougherty-Bliss and N. J. A. Sloane, Jul 28 2021
STATUS
approved