260864
domain: N
Appears in sequences
- Numbers n such that phi(n) + 1 | sigma(n).at n=14A056097
- Numbers k such that sigma(k) == 4 (mod phi(k)).at n=9A067193
- Triangle arising from (4,2) tennis ball problem, read by rows.at n=47A078990
- 10th-order Fibonacci numbers: a(n+1) = a(n)+...+a(n-9) with a(0) = ... = a(8) = 0, a(9) = 1.at n=28A122265
- If an array is made of columns of -nacci sequences, fibo-, tribo- etc. all starting w. 1,1,2 etc, the NW to SE diagonals can be extended by computation. The above is diagonal 11. See A159741 for details.at n=8A159748
- Number of separable multisets of size n covering an initial interval of positive integers.at n=19A336103
- Number of strings of Hebrew letters with a gematria value equal to n.at n=18A339073