OFFSET
1,2
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..253
FORMULA
a(n) = n^2 * a(n-1) + a(n-2) for n > 2. - Seiichi Manyama, Jun 05 2018
a(n) ~ c * n^(2*n + 1) / exp(2*n), where c = 6.5347337470474831902516177263695578212049901774805425962967688345920604685... - Vaclav Kotesovec, Aug 14 2021
MATHEMATICA
Table[Numerator[FromContinuedFraction[Range[0, n]^2]], {n, 1, 20}] (* Vaclav Kotesovec, Aug 14 2021 *)
PROG
(PARI) A036245(n) = my(v=vector(n+1)); for(i=1, n+1, if(i==1, v[i]=0, if(i==2, v[i]=1, v[i]=(i-1)^2*v[i-1]+v[i-2]))); v[n+1] \\ Jianing Song, Nov 30 2019
CROSSREFS
KEYWORD
frac,nonn
AUTHOR
EXTENSIONS
More terms from Seiichi Manyama, Jun 05 2018
STATUS
approved