22042
domain: N
Appears in sequences
- 4-wave sequence beginning with 2s.at n=28A060824
- a(n) = 2*prime(n)*prime(n+1).at n=26A069486
- Smallest m such that A098371(m) = n.at n=44A098373
- Largest number not the sum of n distinct nonzero squares.at n=34A129210
- Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 11.at n=1A154084
- Numbers k such that 3*6^k - 1 is prime.at n=31A186106
- Ordered perimeters p of primitive Pythagorean triangles no side of which is squarefree.at n=37A329392
- Expansion of Product_{i>=1, j>=1} (1 + i*x^(i*j)).at n=17A333653
- a(1) = 12; for n >= 2, a(n) = least positive integer of the form prime(m)*prime(n-m)*prime(n) with m >= 1.at n=27A364434
- a(n) = A002070(n) + A036689(n).at n=34A366346
- Expansion of (1-3*x^2) / (1-x-4*x^2+2*x^3+2*x^4).at n=14A384598