5656566
domain: N
Appears in sequences
- Triangular numbers that contain exactly 2 different digits.at n=31A062691
- Triangular numbers in which neighboring digits differ at most by 1. Allowed neighbors of 9 are 0, 8 and 9.at n=27A068149
- Triangular numbers composed of digits {0,5,6}.at n=11A119079
- Triangular numbers composed of digits {1,5,6}.at n=19A119132
- Triangular numbers composed of digits {2,5,6}.at n=10A119164
- Triangular numbers composed of digits {3,5,6}.at n=12A119186
- Triangular numbers composed of digits {4,5,6}.at n=14A119202
- Triangular numbers composed of digits {5,6,7}.at n=6A119218
- Triangular numbers composed of digits {5,6,8}.at n=8A119220
- Triangular numbers composed of digits {5,6,9}.at n=8A119222
- Triangular numbers having only 1 or 2 different digits in base 10.at n=38A213516
- a(n) is the A325907(n)-th triangular number.at n=2A309597