149912

Appears in sequences

• Multiply by 1, add 1, multiply by 2, add 2, etc., start with 1.at n=15A019464
• a(0) = 1, a(n+1) = (n+1)*(a(n) + n).at n=8A085923
• Sierpinski square-based pyramid numbers: a(n) = 5*a(n-1) - (2^(n+1) + 7).at n=7A279511