28578

Appears in sequences

• At stage 1, start with a unit square. At each successive stage add 4*(n-1) new squares around outside with edge-to-edge contacts. Sequence gives number of squares (regardless of size) at n-th stage.at n=34A056640
• Numbers that can be formed using its own digits in order and only addition and fourth power operators.at n=30A195672
• Number of nX2 0..2 arrays with every 1 immediately preceded by 0 to the left or above, no 0 immediately preceded by a 0, and every 2 immediately preceded by 0 1 to the left or above.at n=20A203175
• Sum of 4th powers of proper divisors of n.at n=25A279363
• Antidiagonal sums of the array defined in A385623.at n=32A385624