133332
domain: N
Appears in sequences
- Expansion of 1/(1-x^3-x^4-x^5-x^6).at n=41A017819
- Number of Fibonacci numbers F(k), k <= 10^n, which end in 3.at n=5A073551
- a(n)*n = A112902(n).at n=4A112903
- Numbers k such that the k-th triangular number contains only digits {0,7,8}.at n=8A119094
- Numbers k such that the k-th triangular number contains only digits {1,7,8}.at n=13A119147
- Numbers k such that the k-th triangular number contains only digits {2,7,8}.at n=14A119179
- Numbers k such that the k-th triangular number contains only digits {3,7,8}.at n=7A119201
- Numbers k such that the k-th triangular number contains only digits {4,7,8}.at n=6A119217
- Numbers k such that the k-th triangular number contains only digits {5,7,8}.at n=13A119225
- Numbers k such that the k-th triangular number contains only digits {6,7,8}.at n=9A119231
- Numbers k such that the k-th triangular number contains only digits {7,8,9}.at n=4A119237
- Numbers k such that k and k^2 use only the digits 1, 2, 3, 4 and 7.at n=17A136970
- Twice repdigit numbers.at n=42A152966
- Numbers n such that the triangular number n*(n+1)/2 has only 1 or 2 different digits in base 10.at n=45A213517
- Numbers k such that the triangular number k*(k+1)/2 has 2 different digits in base 10.at n=38A213518