A396287 - OEIS

%I #12 May 21 2026 16:41:51

%S 1,2,18,104994,121522844381309386290,

%T 218087967243211343601293080693944220009283482715374120407628181429351990598196290

%N a(n) = a(n-1) + a(n-1)^4 with a(0)=1.

%H Paolo Xausa, <a href="/A396287/b396287.txt">Table of n, a(n) for n = 0..6</a>

%t NestList[# + #^4 &, 1, 6] (* _Paolo Xausa_, May 21 2026 *)

%o (PARI) a(n) = if(n==0, 1, a(n-1)+a(n-1)^4);

%Y Rows sum of A396277.

%Y Cf. A074333.

%K nonn,easy

%O 0,2

%A _Seiichi Manyama_, May 21 2026