231441

Appears in sequences

• a(n) = (n+1)*(n^4-4*n^3+11*n^2-8*n+12)/12.at n=20A302612
• a(n) appears in the congruences modulo 4 or 32 of Markoff numbers m(n) = A002559(n) for odd or even m(n).at n=39A309376