222778
domain: N
Appears in sequences
- a(n) = 4^n - 2*3^n.at n=9A002250
- Triangular numbers composed of digits {2,7,8}.at n=4A119178
- Triangular numbers with digits in nondecreasing order.at n=27A234848
- a(n) = A000217(A000217(n)+1).at n=36A267707
- Numbers that start a run of four consecutive triangular numbers with four distinct prime factors.at n=29A349773
- Numbers that start a run of four consecutive triangular numbers with four prime factors (counted with multiplicity).at n=1A349774
- Number of unordered pairs of distinct strict integer partitions of n.at n=36A366132