343536
domain: N
Appears in sequences
- Decimal concatenation of n, n+1, and n+2.at n=34A001703
- Theta series of D_9 lattice.at n=9A008431
- Number of ways of writing n as a sum of 9 squares.at n=18A008452
- Duplicate of A001703.at n=34A127422
- Number of quadrilaterals in a triangular matchstick arrangement of side n.at n=32A204185
- Concatenate (3n-2,3n-1,3n).at n=11A248556
- a(n) = [x^n] (theta_3(x^(1/2))^n + theta_4(x^(1/2))^n)/2, where theta_3() and theta_4() are the Jacobi theta functions.at n=9A303333