29238
domain: N
Appears in sequences
- a(n) is the index of the smallest triangular number containing exactly n 4's.at n=4A048359
- Positions of 4-digit terms in the continued fraction for Pi (3 is at position 0).at n=24A048959
- Main diagonal of number array A082105.at n=13A082106
- Numbers k such that 7*10^k + 5*R_k - 2 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=11A103061