2001000
domain: N
Appears in sequences
- Smallest triangular number containing exactly n 0's.at n=4A036517
- Triangular numbers with sum of digits = 3.at n=7A068127
- Smallest n-digit triangular number with minimum digit sum.at n=6A069671
- Largest n-digit triangular number with minimum digit sum.at n=6A069672
- Triangular numbers composed of digits {0,1,2}.at n=10A119033
- Sum of any three adjacent digits of n^2 is a square.at n=56A174397
- a(n) = A185128(n) - A185129(n).at n=27A185253
- In base 3, 0, together with numbers of the form i00j00k00m00... where i = 1 or 2 and j,k,m,... are 0, 1, or 2.at n=37A261660
- Triangular numbers that can be represented as a sum of two distinct triangular numbers, and as a product of two triangular numbers greater than 1.at n=33A295768
- Triangular numbers that are palindromes in base 9.at n=20A350993