110329

Appears in sequences

• a(n+2) = 7*a(n+1) - 7*a(n) - 9*n; a(n+4) = 9*a(n+3) - 22*a(n+2) + 21*a(n+1) - 7*a(n).at n=8A030429
• Row sums of A117683.at n=17A117684