A397313 - OEIS

%I #14 Jun 21 2026 00:35:05

%S 1,13,2,26,3,21,4,30,5,651,6,577,7,25,8,441,9,2924,10,20,11,2121,12,

%T 49,15,31,16,1722,14,1764,17,29,18,42,19,2116,23,32,24,12217,22,5550,

%U 28,48,34,6480,33,43,27,40,35,401,36,50,37,55,38,24650,39,38809,46

%N Index of n in A396013, or -1 if n never appears.

%H Scott R. Shannon, <a href="/A397313/b397313.txt">Table of n, a(n) for n = 2..442</a>

%H Michael S. Branicky, <a href="/A396013/a396013.py.txt">Python program for OEIS A396013 and A397313</a>

%Y Cf. A396013, A397314, A397168.

%K nonn

%O 2,2

%A _Scott R. Shannon_, Jun 20 2026