1328602
domain: N
Appears in sequences
- a(0) = 1; a(n) = (5*3^(n-1) - 1)/2 for n > 0.at n=13A060816
- Expansion of (1+2x-x^3+x^4)/(1-4x^2+3x^4).at n=25A181655
- Expansion of (1+2*x+2*x^2-x^3)/((1-x)*(1+x)*(1-3x^2)).at n=25A220946
- a(n) = (5*9^n - 1)/2.at n=6A255043
- Array A read by upward antidiagonals: A(n,k) = ((2*n+1)*9^k-1)/2, n,k >= 0.at n=42A255044
- Row sums of A321624.at n=13A321573
- a(n) = n+1 for n <= 2; otherwise a(n) = 3*a(n-3)+1.at n=37A329774
- Least number m for which there exists some positive k < m where the sum of the integers from k + 1 to m inclusive is an n-th power > 1.at n=24A372782