660451885056
domain: N
Appears in sequences
- Three people (P1, P2, P3) are in a circle and are saying Hello to each other. They start with P2 saying "Hello, Hello". Thereafter Pn says "Hello" for n times the total number of Hello's so far.at n=25A076507
- Expansion of 3*(1+2*x+6 x^2)/(1-24*x^3).at n=25A076510
- Array T(i,1)=i, T(1,j)=j and T(i,j)=T(i-1,j-1)*T(i,j-1) read by antidiagonals.at n=48A085916
- Rubik's Square sequence.at n=6A225790
- Number of permutations p of [n] such that p(i)-i is a multiple of nine for all i in [n].at n=35A275064