350208

Appears in sequences

• a(n) = (1/3)*(n^2 + 2*n + 3)*(n+1)^2.at n=31A014820
• a(n) = (2^(n+1) + (-4)^n)/3.at n=10A083086
• a(n) = - a(n-1) + 5(a(n-2) + a(n-3)) - 2(a(n-4) + a(n-5)) - 8(a(n-6) + a(n-7)).at n=21A090597
• G.f.: (1+14*x+x^2)^3/((1-x))^4.at n=9A113922
• Octagonal numbers of the form C*(3C - 2) with 3C - 2 = k^2 and C a composite number.at n=15A125511
• Number of (n+2)X(7+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=4A253840
• Number of (5+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=6A253845
• (1/8) times the sum of the elements of all subsets of [n] whose sum is divisible by eight.at n=18A309300